MARKET STUDY All analysis covers resale homes only. New construction appears once, in its own section. Click any dot on the map for that sale.
Resale sales, 365 days
17
single-family resale homes
Median net sale price
$768,250
average $768,795
Median net price per SF
$270
average $279
Median days on market
45 days
average 72 days
1. SummaryResale homes · 17 sales · October 26, 2025 – October 25, 2026
This study looks at the 17 resale homes sold in Cardinal Hills in the 365 days to October 25, 2026. A full year is used because only 10 resale homes sold in the last 180 days. New construction is left out and shown on its own in section 7. The homes are compared four ways: by price, by living area, by year built and with or without a view. The first three are split into four equal groups (quartiles), each named by its range.
Each comparison has its own section (3–6) with everything about it in one place: the key differences, a table of every measure at a glance, the charts and the numbers.
2. Where the resale homes sold17 resale homes · colored by price range
Each dot is one resale home, colored by its price range. Use the buttons to show one price range at a time. Click a dot for that sale: address, close date, original and last list price, net sale price, living area, net sale per SF and days on market. Scroll or pinch to zoom.
3. Quartiles by net sale priceResale homes · 17 sales · October 26, 2025 – October 25, 2026
Sales ranked by net sale price and cut into four equal groups. This is the usual way to read a market by price.
Bottom line: too few sales to test.
3.1 Key differences
The top group against the bottom group: no measure differs enough to rule out chance.
How to read this section. Each heading gives the finding. The gold box says whether the gap is real (✓, with its size) or could be chance (–). The section ends with its numbers; the tests are in section 8.3.
3.3 Net price per SF: described, not tested
The average is $348 per SF for homes over $835K and $287 per SF for homes under $589K. It does not move in a straight line; homes over $835K are highest. Defined in 8.1.2.
Not tested: too few sales.
3.4 Living area: described, not tested
The average is 3,222 SF for homes over $835K and 1,705 SF for homes under $589K. It does not move in a straight line; homes over $835K are highest. Defined in 8.1.3.
Not tested: too few sales.
3.5 Year built: described, not tested
The median is 2007 for homes over $835K and 1998 for homes under $589K. It does not move in a straight line; homes $768K–$835K are highest. Defined in 8.1.4.
Not tested: too few sales.
3.6 Days on market: described, not tested
The median is 56 days for homes over $835K and 34 days for homes under $589K. It does not move in a straight line; homes over $835K are highest. Defined in 8.1.5.
Not tested: too few sales.
3.7 Discount from original list: described, not tested
The average is 11.7% for homes over $835K and 4.6% for homes under $589K. It does not move in a straight line; homes over $835K are highest. Defined in 8.1.6.
Not tested: too few sales.
3.8 How often: price cut before sale, seller paid closing costs or repairs, has a view
Each bar is the share of homes in the group, in percent.
75% of homes over $835K had a price cut before sale, against 25% of homes under $589K. Defined in 8.1.7.
0% of homes over $835K had the seller pay closing costs or repairs, against 75% of homes under $589K. Defined in 8.1.8.
100% of homes over $835K have a view, against 25% of homes under $589K. Defined in 8.1.9.
Price cut before sale: Not tested: too few sales.
Seller paid closing costs or repairs: Not tested: too few sales.
Has a view: Not tested: too few sales.
3.9 The numbers: price and size
Under $589K4 sales
$589K–$718K4 sales
$768K–$835K5 sales
Over $835K4 sales
All17 sales
Net sale price average
$486,548
$658,768
$801,650
$1,120,000
$768,795
Net price per SF average
$287
$214
$267
$348
$279
Living area average
1,705
3,210
3,044
3,222
2,810
Year built median
1998
2002
2008
2007
2005
3.10 The numbers: selling
Under $589K4 sales
$589K–$718K4 sales
$768K–$835K5 sales
Over $835K4 sales
All17 sales
Days on market median
34
32
43
56
45
Discount from original list average
4.6%
3.8%
8.2%
11.7%
7.1%
Price cut before sale
25%
25%
40%
75%
41%
Seller paid closing costs or repairs
75%
100%
60%
0%
59%
Has a view
25%
50%
100%
100%
71%
Prices, price per SF, living area and discount are averages; days on market and year built are medians. The test behind each verdict is in 8.3.1.
4. Quartiles by living areaResale homes · 17 sales · October 26, 2025 – October 25, 2026
Sales ranked by living area and cut into four equal groups, from the smallest homes to the largest.
Bottom line: too few sales to test.
4.1 Key differences
The top group against the bottom group: no measure differs enough to rule out chance.
4.3 Net sale price: described, not tested
The average is $879K for homes over 3,375 SF and $487K for homes under 2,291 SF. It does not move in a straight line; homes 2,984–3,375 SF are highest. Defined in 8.1.1.
Not tested: too few sales.
4.4 Net price per SF: described, not tested
The average is $239 per SF for homes over 3,375 SF and $287 per SF for homes under 2,291 SF. It does not move in a straight line; homes 2,984–3,375 SF are highest. Defined in 8.1.2.
Not tested: too few sales.
4.5 Year built: described, not tested
The median is 2006 for homes over 3,375 SF and 1998 for homes under 2,291 SF. It does not move in a straight line; homes 2,984–3,375 SF are highest. Defined in 8.1.4.
Not tested: too few sales.
4.6 Days on market: described, not tested
The median is 46 days for homes over 3,375 SF and 34 days for homes under 2,291 SF. It does not move in a straight line; homes 2,984–3,375 SF are highest. Defined in 8.1.5.
Not tested: too few sales.
4.7 Discount from original list: described, not tested
The average is 11.1% for homes over 3,375 SF and 4.6% for homes under 2,291 SF. It does not move in a straight line; homes over 3,375 SF are highest. Defined in 8.1.6.
Not tested: too few sales.
4.8 How often: price cut before sale, seller paid closing costs or repairs, has a view
Each bar is the share of homes in the group, in percent.
50% of homes over 3,375 SF had a price cut before sale, against 25% of homes under 2,291 SF. Defined in 8.1.7.
50% of homes over 3,375 SF had the seller pay closing costs or repairs, against 75% of homes under 2,291 SF. Defined in 8.1.8.
50% of homes over 3,375 SF have a view, against 25% of homes under 2,291 SF. Defined in 8.1.9.
Price cut before sale: Not tested: too few sales.
Seller paid closing costs or repairs: Not tested: too few sales.
Has a view: Not tested: too few sales.
4.9 The numbers: price and size
Under 2,291 SF4 sales
2,291–2,596 SF4 sales
2,984–3,375 SF5 sales
Over 3,375 SF4 sales
All17 sales
Net sale price average
$486,548
$690,512
$969,000
$879,068
$768,795
Net price per SF average
$287
$277
$304
$239
$279
Living area average
1,705
2,491
3,212
3,730
2,810
Year built median
1998
2006
2007
2006
2005
4.10 The numbers: selling
Under 2,291 SF4 sales
2,291–2,596 SF4 sales
2,984–3,375 SF5 sales
Over 3,375 SF4 sales
All17 sales
Days on market median
34
44
54
46
45
Discount from original list average
4.6%
1.7%
10.4%
11.1%
7.1%
Price cut before sale
25%
25%
60%
50%
41%
Seller paid closing costs or repairs
75%
75%
40%
50%
59%
Has a view
25%
100%
100%
50%
71%
Prices, price per SF, living area and discount are averages; days on market and year built are medians. The test behind each verdict is in 8.3.2.
5. Quartiles by year builtResale homes · 17 sales · October 26, 2025 – October 25, 2026
Sales ranked by year built and cut into four groups, from the oldest to the newest. Homes built in the same year always stay in the same group, so group sizes can differ a little.
Bottom line: too few sales to test.
5.1 Key differences
The top group against the bottom group: no measure differs enough to rule out chance.
5.3 Net sale price: described, not tested
The average is $924K for homes built after 2007 and $576K for homes built before 1998. It rises step by step from the lowest range to the highest. Defined in 8.1.1.
Not tested: too few sales.
5.4 Net price per SF: described, not tested
The average is $304 per SF for homes built after 2007 and $269 per SF for homes built before 1998. It rises step by step from the lowest range to the highest. Defined in 8.1.2.
Not tested: too few sales.
5.5 Living area: described, not tested
The average is 3,084 SF for homes built after 2007 and 2,328 SF for homes built before 1998. It does not move in a straight line; homes built 2006–2007 are highest. Defined in 8.1.3.
Not tested: too few sales.
5.6 Days on market: described, not tested
The median is 65 days for homes built after 2007 and 32 days for homes built before 1998. It does not move in a straight line; homes built after 2007 are highest. Defined in 8.1.5.
Not tested: too few sales.
5.7 Discount from original list: described, not tested
The average is 12.2% for homes built after 2007 and 4.4% for homes built before 1998. It rises step by step from the lowest range to the highest. Defined in 8.1.6.
Not tested: too few sales.
5.8 How often: price cut before sale, seller paid closing costs or repairs, has a view
Each bar is the share of homes in the group, in percent.
75% of homes built after 2007 had a price cut before sale, against 25% of homes built before 1998. Defined in 8.1.7.
25% of homes built after 2007 had the seller pay closing costs or repairs, against 100% of homes built before 1998. Defined in 8.1.8.
100% of homes built after 2007 have a view, against 50% of homes built before 1998. Defined in 8.1.9.
Price cut before sale: Not tested: too few sales.
Seller paid closing costs or repairs: Not tested: too few sales.
Has a view: Not tested: too few sales.
5.9 The numbers: price and size
Before 19984 sales
1998–20055 sales
2006–20074 sales
After 20074 sales
All17 sales
Net sale price average
$575,641
$681,970
$915,525
$923,750
$768,795
Net price per SF average
$269
$271
$274
$304
$279
Living area average
2,328
2,529
3,368
3,084
2,810
Year built median
1991
2005
2006
2020
2005
5.10 The numbers: selling
Before 19984 sales
1998–20055 sales
2006–20074 sales
After 20074 sales
All17 sales
Days on market median
32
43
34
65
45
Discount from original list average
4.4%
4.5%
8.1%
12.2%
7.1%
Price cut before sale
25%
40%
25%
75%
41%
Seller paid closing costs or repairs
100%
60%
50%
25%
59%
Has a view
50%
60%
75%
100%
71%
Prices, price per SF, living area and discount are averages; days on market and year built are medians. The test behind each verdict is in 8.3.3.
6. View and no viewResale homes · 17 sales · October 26, 2025 – October 25, 2026
Sales where the MLS lists a view (greenbelt or park, trees, golf course, hill country, water and similar) against those listing none or only the neighborhood.
Bottom line: no measure differs enough between the groups to rule out chance.
6.1 Key differences
The top group against the bottom group: no measure differs enough to rule out chance.
6.2 At a glance
Shaded rows are real differences; the darkest cell is the highest. Gray rows show no clear difference. Prices are averages; days on market and year built are medians.
View
No view
Real difference?
Net sale price
$849K
$577K
unclear
Net price per SF
$295 per SF
$240 per SF
unclear
Living area
2,882 SF
2,637 SF
unclear
Year built
2006
1998
unclear
Days on market
52 days
16 days
unclear
Discount from original list
8.0%
5.2%
unclear
Price cut before sale
50%
20%
unclear
Seller paid closing costs or repairs
50%
80%
unclear
6.3 Net sale price: no clear difference
The average is $849K for homes with a view and $577K for homes without a view. Defined in 8.1.1.
– No clear difference · could be chance
6.4 Net price per SF: no clear difference
The average is $295 per SF for homes with a view and $240 per SF for homes without a view. Defined in 8.1.2.
– No clear difference · could be chance
6.5 Living area: no clear difference
The average is 2,882 SF for homes with a view and 2,637 SF for homes without a view. Defined in 8.1.3.
– No clear difference · could be chance
6.6 Year built: no clear difference
The median is 2006 for homes with a view and 1998 for homes without a view. Defined in 8.1.4.
– No clear difference · could be chance
6.7 Days on market: no clear difference
The median is 52 days for homes with a view and 16 days for homes without a view. Defined in 8.1.5.
– No clear difference · could be chance
6.8 Discount from original list: no clear difference
The average is 8.0% for homes with a view and 5.2% for homes without a view. Defined in 8.1.6.
– No clear difference · could be chance
6.9 How often: price cut before sale, seller paid closing costs or repairs
Each bar is the share of homes in the group, in percent.
50% of homes with a view had a price cut before sale, against 20% of homes without a view. Defined in 8.1.7.
50% of homes with a view had the seller pay closing costs or repairs, against 80% of homes without a view. Defined in 8.1.8.
Price cut before sale: – No clear difference · could be chance
Seller paid closing costs or repairs: – No clear difference · could be chance
6.10 The numbers: price and size
View12 sales
No view5 sales
All17 sales
Real difference?
Net sale price average
$848,892
$576,561
$768,795
unclear
Net price per SF average
$295
$240
$279
unclear
Living area average
2,882
2,637
2,810
unclear
Year built median
2006
1998
2005
unclear
6.11 The numbers: selling
View12 sales
No view5 sales
All17 sales
Real difference?
Days on market median
52
16
45
unclear
Discount from original list average
8.0%
5.2%
7.1%
unclear
Price cut before sale
50%
20%
41%
unclear
Seller paid closing costs or repairs
50%
80%
59%
unclear
Prices, price per SF, living area and discount are averages; days on market and year built are medians. The test behind each verdict is in 8.3.4.
7. New constructionBasic statistics · 2 sales · October 26, 2025 – October 25, 2026
Homes sold new by the builder in the same 365 days. They are left out of every other section and shown here as basic figures only: 2 sales, no groups, no tests.
Note: these are only the new-construction sales reported in ABOR MLS. Builders often sell homes without listing them in the MLS, so these figures do not necessarily represent all new-construction sales in Cardinal Hills.
Measure
Average
Median
Sales
2
Net sale price
$930,462
$930,462
Net price per SF
$257
$257
Living area (SF)
3,790
3,790
Days on market
18
18
Discount from original list
1.6%
1.6%
Price cut before sale
0% of sales
Seller paid closing costs or repairs
50% of sales
Year built
2022–2026
Same definitions as the rest of the study (section 8). New construction = NewConstructionYN true, or PropertyCondition “New Construction” or “Under Construction”.
8. AppendixMeasures, methods and tests
Each measure and method three ways: in plain words, as statistics, and with the data from this study.
8.1 Measures
8.1.1 Net sale price
In simple terms
What the seller actually kept: the closing price, less money the seller gave back to the buyer for closing costs or repairs. It is the truest price for comparing homes.
Statistically
Net = ClosePrice − ACTRIS_BuyersClsgCostPdbySell − ACTRIS_RepairsAmount (a blank counts as $0). Summarized by the arithmetic mean in the slices.
The data
17 resale sales. Average $768,795; median $768,250; standard deviation $251,328; middle half (25th–75th percentile) $589,300–$835,000; lowest $437,000, highest $1,285,000. 10 sales had a seller payment; their median payment was $8,384.
8.1.2 Net price per SF
In simple terms
Net sale price divided by the heated and cooled square feet. It puts homes of different sizes on the same footing: did buyers pay more for each square foot, not just for more square feet?
Statistically
psf = Net ÷ LivingArea, per sale; summarized by the mean of the per-sale ratios.
The data
17 resale sales. Average $279; median $270; standard deviation $63; middle half (25th–75th percentile) $244–$308; lowest $176, highest $431.
8.1.3 Living area
In simple terms
The heated and cooled space, as listed in the MLS. Garages and porches are not counted.
Statistically
RESO LivingArea, in square feet. Sales under 400 SF are treated as entry errors and left out.
The data
17 resale sales. Average 2,810; median 2,984; standard deviation 794; middle half (25th–75th percentile) 2,291–3,375; lowest 1,534, highest 4,077.
8.1.4 Year built
In simple terms
The year the home was finished, as listed in the MLS. It shows whether a group leans to older or newer phases of the community.
Statistically
RESO YearBuilt; summarized by the median, with the 25th–75th percentile (middle half) on the charts.
The data
17 resale sales. Average 2004; median 2005; standard deviation 11; middle half (25th–75th percentile) 1998–2007; lowest 1984, highest 2022.
8.1.5 Days on market
In simple terms
How many days the home was on the market before the buyer's offer was accepted, counting any earlier listing periods (relists). This is the days on market agents and clients quote.
Statistically
CDOM = max(CumulativeDaysOnMarket, DaysOnMarket, PurchaseContractDate − ListingContractDate). The MLS counter can freeze at a price change, so the contract-date gap is a floor. Summarized by the median, because a few homes that sat for months pull an average up.
The data
17 resale sales. Average 72; median 45; standard deviation 100; middle half (25th–75th percentile) 19–69; lowest 5, highest 422. 0 sales went under contract on their listing date (0 days).
8.1.6 Discount from original list
In simple terms
How far below the first asking price the home sold, after seller payments. It measures how much negotiating room sellers gave up. A negative figure means the home sold above its first asking price.
Statistically
Discount % = (OriginalListPrice − Net) ÷ OriginalListPrice × 100, per sale; summarized by the mean.
The data
17 resale sales. Average 7.1%; median 6.7%; standard deviation 7.7%; middle half (25th–75th percentile) 2.8%–8.8%; lowest −3.8%, highest 27.9%. 2 sales closed above their first asking price.
8.1.7 Price cut before sale
In simple terms
The asking price was lowered at least once before the home went under contract.
Statistically
Indicator: ListPrice at close < OriginalListPrice. Reported as the share of sales (%).
The data
7 of 17 resale sales (41.2%).
8.1.8 Seller paid closing costs or repairs
In simple terms
The seller paid some of the buyer's closing costs or repairs.
Statistically
Indicator: ACTRIS_BuyersClsgCostPdbySell + ACTRIS_RepairsAmount > 0. Reported as the share of sales (%).
The data
10 of 17 resale sales (58.8%).
8.1.9 Has a view
In simple terms
The MLS says the home looks over something: a greenbelt or park, trees, golf course, hill country, water and similar.
Statistically
View = the View field holds any entry other than “None”, “Neighborhood” or “See Remarks”. No view = only “None” and/or “Neighborhood”. A record whose only entry is “See Remarks” cannot be classified and is left out of the view slice.
The data
12 sales with a view, 5 without, 0 unclassified. Most common View entries: Hill Country 7, Trees/Woods 7, Park/Greenbelt 5, None 4, Panoramic 3, Neighborhood 3, Canyon 2, Pool 1.
8.2 Methods
8.2.1 Data source
In simple terms
Every figure comes from the Austin Board of REALTORS® MLS, read live by ALEX. No figure is estimated or typed in.
Statistically
Bridge Interactive RESO Web API (OData), ABOR dataset, every field returned. Filter: StandardStatus = Closed, PropertyType = Residential, City = Austin, SubdivisionName contains any of “cardinal hills” (case-insensitive). A record is kept when its subdivision name belongs to the Cardinal Hills family, the same rule comparable sales use.
The data
Pulled October 26, 2026: 19 closed Cardinal Hills records over the prior year, in ZIP 78734. 9 subdivision spellings kept: Cardinal Hills Unit 01 (4); Cardinal Hills Unit 04 (3); Cardinal Hills Unit 06 (3); Cardinal Hills Unit 02 (2); Cardinal Hills Unit 03 (2); Cardinal Hills Unit 05 (2); Cardinal Hills Unit 2 (1); Cardinal Hills Unit 5 Amd (1); Cardinal Hills (1). Names found by the search but not part of Cardinal Hills, left out: Cardinal Hills Estates Unit 15 (10); Cardinal Hills Estates Unit 14 (2); Cardinal Hills Estates Unit 11 (2); Cardinal Hills Estates (1); CARDINAL HILLS ESTATES (1); Lakeway; Cardinal Hills Estates Unit 15 (1); Cardinal Hills Estates Unit 12 (1).
8.2.2 Study window
In simple terms
The most recent 365 days of closed sales: recent enough to describe today's market, long enough to give each group plenty of sales. The usual window is 180 days; it holds only 10 resale sales here (under 80), so the full year is used.
Statistically
CloseDate from October 26, 2025 to October 25, 2026 inclusive.
The data
19 single-family sales in the window: 17 resale, 2 new construction.
8.2.3 Resale and new construction
In simple terms
A resale home was previously owned. New construction is sold by the builder and behaves differently, so it is kept out of every analysis and reported once on its own.
Statistically
New construction = NewConstructionYN true, or PropertyCondition contains “New Construction” or “Under Construction”. Everything else is resale.
The data
17 resale; 2 new construction.
8.2.4 Sales left out
In simple terms
A few records cannot be used as entered and are left out before any analysis.
Statistically
Excluded: PropertySubType other than Single Family Residence; no OriginalListPrice; LivingArea under 400 SF; seller payments above 10% of ClosePrice (treated as entry errors).
The data
None in this window.
8.2.5 Quartiles and groups
In simple terms
Sales lined up from lowest to highest and cut into four groups of about equal size. Each group is named by its range, for example “Under $589K”.
Statistically
Sort by the slicing variable; cut k sits at round(nk/4), k = 1…3. A cut that would split tied values moves to the nearer edge of the tie. A group under 3 sales merges into its smaller neighbor. Range names use the next group's lowest value (“Under”) and the previous group's highest value (“Over”/“After”).
The data
Quartiles by net sale price: Under $589K: $437,000–$534,600 (4 sales); $589K–$718K: $589,300–$717,800 (4 sales); $768K–$835K: $768,250–$835,000 (5 sales); Over $835K: $840,000–$1,285,000 (4 sales) Quartiles by living area: Under 2,291 SF: 1,534–2,045 SF (4 sales); 2,291–2,596 SF: 2,291–2,596 SF (4 sales); 2,984–3,375 SF: 2,984–3,375 SF (5 sales); Over 3,375 SF: 3,429–4,077 SF (4 sales) Quartiles by year built: Before 1998: 1984–1997 (4 sales); 1998–2005: 1998–2005 (5 sales); 2006–2007: 2006–2007 (4 sales); After 2007: 2008–2022 (4 sales) View and no view: View: MLS lists a view (12 sales); No view: None or Neighborhood (5 sales)
8.2.6 Average and median
In simple terms
The average adds the values and divides by how many; one very expensive home can pull it up. The median is the middle value, with half above and half below.
Statistically
Mean x̄ = (1/n) Σ xᵢ; median = 50th percentile. Price, price per SF, living area and discount use the mean; days on market and year built use the median (skewed or whole-year values).
The data
Net sale price: average $768,795, median $768,250. Days on market: average 72, median 45: the average is pulled up by a few long listings.
8.2.7 Kruskal–Wallis test
In simple terms
Checks whether a measure really differs across the four groups of a slice. It uses each sale's rank, not its value, so a few extreme sales cannot drive the answer.
Statistically
H = [12/(n(n+1))] Σ Rⱼ²/nⱼ − 3(n+1), compared with χ² on k − 1 degrees of freedom (Kruskal & Wallis, 1952). Effect size ε² = H/(n − 1): ≥ .01 small, ≥ .06 medium, ≥ .14 large (Tomczak & Tomczak, 2014). A slice is tested only when every group has at least 5 sales; smaller groups are described, not tested.
The data
Run on every measure in sections 3–5; each result is in 8.3.
8.2.8 Mann–Whitney U test
In simple terms
The same check when there are only two groups: view against no view.
Statistically
Two-sided U test (Mann & Whitney, 1947). Effect size = rank-biserial correlation |1 − 2U/(n₁n₂)|: ≥ .10 small, ≥ .30 medium, ≥ .50 large (Kerby, 2014; Cohen, 1988).
The data
Run on every measure in section 6; results in 8.3.
8.2.9 Chi-square test
In simple terms
Checks whether a yes/no share (price cut, seller payment, view) differs between groups more than chance would.
Statistically
Pearson χ² on the 2 × k table of counts, no continuity correction (Pearson, 1900). Effect size Cramér's V = √(χ²/n): ≥ .10 small, ≥ .30 medium, ≥ .50 large (Cramér, 1946).
The data
Run on the three shares in every slice; results in 8.3.
8.2.10 Real difference (significance)
In simple terms
“Real difference” means a gap this large would be very unlikely if the groups were really alike. Because many measures are checked in each slice, the bar is set higher than usual.
Statistically
Significant when p < 0.05 ÷ m, where m is the number of measures tested in that slice (Bonferroni; Dunn, 1961). The slicing variable itself differs by design and is not tested.
The data
View and no view: m = 8, threshold p < 0.0063
8.2.11 Size of a difference
In simple terms
A difference can be real but small. The size word (small, medium, large) says how much the groups pull apart.
Statistically
ε² for Kruskal–Wallis, rank-biserial r for Mann–Whitney, Cramér's V for chi-square, with the thresholds above; below the small threshold the size is “negligible”.
The data
0 real differences across the four slices; sizes are listed in 8.3.
8.2.12 Rounding in the text
In simple terms
Headings and sentences round figures so they read easily; the tables at the end of each section give them in full.
Statistically
Prices in headings round to the nearest $1K; price per SF and days on market to the nearest whole number; living area to the nearest 10 SF; shares and percentage gaps to whole percents.
The data
Days on market is always shown in days.
8.3 Test results
Every test behind every gold box. Statistic, degrees of freedom (df), p-value, the threshold it must beat, and the size of the difference.
8.3.1 Quartiles by net sale price
Too few sales in a group to test.
8.3.2 Quartiles by living area
Too few sales in a group to test.
8.3.3 Quartiles by year built
Too few sales in a group to test.
8.3.4 View and no view
Measure
Test
Statistic
df
p-value
Threshold
Real difference?
Effect size
Size
Net sale price
Mann–Whitney U
U = 53.00
—
0.0136
p < 0.0063
Unclear
rank-biserial r = 0.767
large
Net price per SF
Mann–Whitney U
U = 43.00
—
0.1946
p < 0.0063
Unclear
rank-biserial r = 0.433
medium
Living area
Mann–Whitney U
U = 34.00
—
0.7214
p < 0.0063
Unclear
rank-biserial r = 0.133
small
Year built
Mann–Whitney U
U = 47.00
—
0.0807
p < 0.0063
Unclear
rank-biserial r = 0.567
large
Days on market
Mann–Whitney U
U = 47.50
—
0.0730
p < 0.0063
Unclear
rank-biserial r = 0.583
large
Discount from original list
Mann–Whitney U
U = 35.00
—
0.6461
p < 0.0063
Unclear
rank-biserial r = 0.167
small
Price cut before sale
Chi-square
χ² = 1.31
1
0.2521
p < 0.0063
Unclear
Cramér’s V = 0.278
small
Seller paid closing costs or repairs
Chi-square
χ² = 1.31
1
0.2521
p < 0.0063
Unclear
Cramér’s V = 0.278
small
8.4 Data notes
Left out of the analysis: 2 new-construction sales (basic statistics only, section 7); nothing else. Statistics: Python, NumPy 2.5.3, SciPy 1.18.1.
8.5 References
Cohen, J. (1988). Statistical Power Analysis for the Behavioral Sciences (2nd ed.). Erlbaum.
Cramér, H. (1946). Mathematical Methods of Statistics. Princeton University Press.
Dunn, O. J. (1961). Multiple comparisons among means. JASA, 56(293), 52–64.
Kerby, D. S. (2014). The simple difference formula: an approach to teaching nonparametric correlation. Comprehensive Psychology, 3, 11.IT.3.1.
Kruskal, W. H., & Wallis, W. A. (1952). Use of ranks in one-criterion variance analysis. JASA, 47(260), 583–621.
Mann, H. B., & Whitney, D. R. (1947). On a test of whether one of two random variables is stochastically larger than the other. Annals of Mathematical Statistics, 18(1), 50–60.
Pearson, K. (1900). On the criterion that a given system of deviations… Philosophical Magazine, 50(302), 157–175.
Tomczak, M., & Tomczak, E. (2014). The need to report effect size estimates revisited. Trends in Sport Sciences, 21(1), 19–25.