taxes Property Tax

School and Appraisal Districts Property Value Study 2014 Report

2014 Confidence Interval Detail
246/Williamson
246-909/Round Rock ISD

Category Summary

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

Stratum
Variance
A 1,901,613,634 0.9858 1,929,005,512 488 13,015 .040761030
A 2,535,138,567 0.9807 2,585,029,639 486 13,020 .009745800
A 3,136,155,223 0.9831 3,190,067,361 493 12,403 .009310127
A 3,796,417,772 0.9757 3,890,968,302 510 10,230 .014713905
B 583,012,831 0.9880 590,093,959 23 2,419 .005277703
B 531,223,442 0.8945 593,877,520 9 42 .020943875
B 547,752,860 0.9608 570,100,812 7 20 .011703112
B 686,780,594 0.9784 701,942,553 7 18 .006223436
C1 82,075,292 0.9615 85,361,718 9 302 .018920603
C1 65,880,774 0.9329 70,619,331 9 75 .053386861
C1 88,864,117 0.9921 89,571,734 8 52 .068672647
C1 91,782,130 1.0054 91,289,168 6 18 .021008290
F1 881,133,330 0.8746 1,007,470,078 18 811 .047844703
F1 924,073,160 0.9200 1,004,427,348 10 228 .068179631
F1 898,270,777 0.9013 996,639,051 9 74 .040607935
F1 1,175,857,569 1.0930 1,075,807,474 7 24 .002843126
L1 200,244,537 1.0358 193,323,554 10 1,344 .003033674
L1 209,205,609 1.0805 193,619,259 10 258 .009360656
L1 204,708,799 0.9882 207,153,207 9 68 .002947341
L1 225,251,864 1.0061 223,886,158 6 22 .004803755
Random Totals: 18,765,442,881   19,290,253,738 2,134 54,443  
Catg D1 Exception Values: 1,504,476   1,396,986      
Total Test Values (4): 18,766,947,357   19,291,650,724      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 964,582,536

Confidence Interval Values (5)

State Lower Limit: 18,327,068,188 (State Test Value minus Margin of Error Percent)
Local Test Value: 18,766,947,357 (Within Confidence Interval)
State Upper Limit: 20,256,233,260 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 18,839,301,135 (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