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2008 Confidence Interval Detail
091/Grayson
091-906/Sherman ISD

Category Summary

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

Stratum
Variance
A 221,887,601 1.0490 211,522,975 21 4,188 .063174632
A 223,371,277 0.9062 246,492,250 21 2,468 .023448184
A 239,358,824 0.9677 247,348,170 16 1,834 .017363288
A 237,363,438 0.9589 247,537,218 10 995 .042038472
B 36,069,796 0.9836 36,671,204 14 287 .002464595
B 29,406,615 0.9666 30,422,734 5 20 .002636942
B 19,519,232 0.9343 20,891,825 4 5 .003488781
F1 115,760,794 0.8851 130,788,379 8 471 .072789515
F1 120,613,210 0.8490 142,065,029 7 112 .227211556
F1 115,391,580 0.8800 131,126,795 6 35 .015441736
F1 130,854,564 0.9136 143,229,602 4 12 .012375806
L1 54,942,606 1.1715 46,899,365 7 548 .037128119
L1 63,406,872 1.0281 61,673,837 7 104 .000437837
L1 48,168,111 1.0451 46,089,476 7 23 .000646269
L1 42,426,457 1.0079 42,093,915 3 6 .004560412
Random Totals: 1,698,540,977   1,784,852,774 140 11,108  
Catg D1 Exception Values: 3,792,171   2,623,923      
Catg B Exception Values: 5,476,000   5,430,000      
Total Test Values (4): 1,707,809,148   1,792,906,697      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 89,645,335

Confidence Interval Values (5)

State Lower Limit: 1,703,261,362 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,707,809,148 (Within Confidence Interval)
State Upper Limit: 1,882,552,032 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,148,290,228 (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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