taxes Property Tax

School and Appraisal Districts Property Value Study 2012 Report

2012 Confidence Interval Detail
043/Collin
043-910/Plano ISD

Category Summary

(1)
Category
(1)
Local
Value
(1)
Stratum
Ratio
(1)
State
Value
(2)
Sample
Size
(3)
Total
Parcels

Stratum
Variance
A 4,977,382,903 0.9706 5,128,150,529 10 30,357 .001926218
A 4,746,424,788 1.0195 4,655,639,812 10 20,333 .002027297
A 4,912,412,078 1.0259 4,788,392,707 10 15,168 .002704347
A 4,853,340,830 1.0171 4,771,744,007 10 7,958 .004382322
B 589,649,035 0.7514 784,733,877 11 196 .120919414
B 508,591,892 0.8171 622,435,310 10 37 .034807085
B 794,401,243 0.8634 920,084,831 10 40 .028812562
B 747,057,394 0.9014 828,774,566 11 24 .014027485
F1 1,670,740,518 0.8893 1,878,714,177 11 964 .034883516
F1 1,614,032,766 0.8790 1,836,214,751 12 204 .013396961
F1 1,903,479,594 0.9967 1,909,781,874 11 84 .002154059
F1 1,633,543,625 1.0022 1,629,957,718 8 21 .000742177
L1 773,867,426 1.0033 771,322,063 10 2,342 .006171017
L1 747,361,305 1.0080 741,429,866 9 196 .004460948
L1 659,813,325 1.0202 646,748,995 8 34 .012195565
L1 756,161,749 1.0026 754,200,827 4 10 .001697739
Random Totals: 31,888,260,471   32,668,325,910 155 77,968  
Catg J Exception Values: 302,942,975   316,546,098      
Catg D1 Exception Values: 1,002,122   904,762      
Total Test Values (4): 32,192,205,568   32,985,776,770      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 1,649,288,839

Confidence Interval Values (5)

State Lower Limit: 31,336,487,931 (State Test Value minus Margin of Error Percent)
Local Test Value: 32,192,205,568 (Within Confidence Interval)
State Upper Limit: 34,635,065,609 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 33,735,022,641 (See ISD Summary Worksheet)

Sources:
(1) See Stratified Category Worksheet Reports PTS236, PTS430
(2) Number of parcels sampled by staff
(3) Total Category Parcels from Stratification Report, Appraisal Roll, or Self-report
(4) Includes any parcels in A, B, C, D3, F1, G1, G2, or L1 marked as exception properties
(5) Unstudied categories and sub-categories were not included in the Confidence Interval Values
(6) Includes local value of unstudied property categories and sub-categories