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2007 Confidence Interval Detail
091/Grayson
091-909/Whitesboro ISD

Category Summary

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

Stratum
Variance
A 48,510,139 0.9799 49,505,193 23 1,328 .001389961
A 48,508,404 0.9875 49,122,434 21 712 .002628085
A 48,574,014 0.9860 49,263,706 19 466 .001904956
A 48,423,306 0.9755 49,639,473 11 280 .001199488
D3 113,092,719 0.9541 118,533,402 34 3,559 .022382571
F1 8,653,563 0.7128 12,140,240 8 94 .110774707
F1 8,449,446 0.7971 10,600,233 6 28 .132730434
F1 8,585,411 0.9475 9,061,120 7 15 .131478524
F1 8,210,025 0.8462 9,702,228 4 7 .030951191
G1 6,642,580 0.7999 8,304,263 6 57 .021849093
G1 6,467,870 0.9058 7,140,506 5 18 .082908464
G1 6,963,730 1.0070 6,915,323 4 9 .009546003
Random Totals: 361,081,207   379,928,121 148 6,573  
Catg D1 Exception Values: 8,647,640   5,613,703      
Catg G1 Exception Values: 5,650,650   5,408,379      
Total Test Values (4): 375,379,497   390,950,203      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 19,547,510

Confidence Interval Values (5)

State Lower Limit: 371,402,693 (State Test Value minus Margin of Error Percent)
Local Test Value: 375,379,497 (Within Confidence Interval)
State Upper Limit: 410,497,713 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 366,731,900 (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

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