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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 48,461,111 0.9799 49,455,160 23 1,328 .001389961
A 48,459,378 0.9875 49,072,788 21 712 .002628085
A 48,524,921 0.9860 49,213,916 19 466 .001904956
A 48,374,366 0.9755 49,589,304 11 280 .001199488
D3 113,215,130 0.9541 118,661,702 34 3,560 .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: 361,007,531   379,856,783 148 6,574  
Catg D1 Exception Values: 8,648,404   5,612,863      
Catg G1 Exception Values: 5,650,650   5,408,379      
Total Test Values (4): 375,306,585   390,878,025      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 19,543,901

Confidence Interval Values (5)

State Lower Limit: 371,334,124 (State Test Value minus Margin of Error Percent)
Local Test Value: 375,306,585 (Within Confidence Interval)
State Upper Limit: 410,421,926 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 368,799,120 (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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