taxes Property Tax

School and Appraisal Districts Property Value Study 2013 Report

2013 Confidence Interval Detail
226/Tom Green
226-907/Grape Creek ISD

Category Summary

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

Stratum
Variance
A 33,973,370 0.9472 35,867,156 11 824 .035428485
A 36,223,510 1.0019 36,154,816 10 455 .067361031
A 34,281,270 0.8917 38,444,847 12 295 .026001690
A 39,208,640 0.9878 39,692,893 16 201 .026086265
E 17,018,240 0.8815 19,306,001 16 391 .045590044
L1 2,505,970 1.0180 2,461,660 8 54 .010413580
L1 2,665,800 1.0475 2,544,916 5 12 .002605485
L1 4,171,480 1.0144 4,112,263 3 6 .000595109
Random Totals: 170,048,280   178,584,552 81 2,238  
Catg D1 Exception Values: 6,653,970   6,271,123      
Catg L1 Exception Values: 1,649,660   1,691,611      
Total Test Values (4): 178,351,910   186,547,286      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 9,327,364

Confidence Interval Values (5)

State Lower Limit: 177,219,922 (State Test Value minus Margin of Error Percent)
Local Test Value: 178,351,910 (Within Confidence Interval)
State Upper Limit: 195,874,650 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 195,634,284 (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