taxes Property Tax

School and Appraisal Districts Property Value Study 2014 Report

2014 Confidence Interval Detail
091/Grayson
091-902/Collinsville ISD

Category Summary

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

Stratum
Variance
A 14,914,173 0.9918 15,037,480 15 276 .007288734
A 16,655,145 0.9860 16,891,628 15 199 .010205744
A 16,297,528 0.9461 17,226,010 15 139 .007497808
A 17,149,987 0.9819 17,466,124 15 80 .010385031
D2 8,209,372 1.0377 7,911,123 14 293 .026474649
E 37,934,605 0.9525 39,826,357 13 362 .008119421
G1 4,593,116 0.9767 4,702,689 12 31 .101437244
Random Totals: 115,753,926   119,061,411 99 1,380  
Catg D1 Exception Values: 3,037,157   2,667,957      
Catg G1 Exception Values: 7,996,913   7,700,294      
Total Test Values (4): 126,787,996   129,429,662      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 6,471,483

Confidence Interval Values (5)

State Lower Limit: 122,958,179 (State Test Value minus Margin of Error Percent)
Local Test Value: 126,787,996 (Within Confidence Interval)
State Upper Limit: 135,901,145 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 136,950,622 (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