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2008 Confidence Interval Detail
170/Montgomery
170-903/Montgomery ISD

Category Summary

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

Stratum
Variance
A 651,466,956 0.9366 695,565,830 13 5,763 .033721536
A 682,463,301 0.9880 690,752,329 19 3,186 .009810283
A 751,715,768 0.9462 794,457,586 11 2,165 .012621095
A 806,633,510 0.9614 839,019,669 9 1,225 .006428389
C 55,962,790 0.9524 58,759,754 7 4,316 .054493755
C 61,538,450 0.8787 70,033,515 6 1,131 .012306390
C 65,641,750 0.8852 74,154,711 7 527 .030777757
C 60,391,610 1.0464 57,713,695 7 172 .010479105
Random Totals: 3,135,814,135   3,280,457,089 79 18,485  
Catg D1 Exception Values: 13,312,807   12,151,521      
Total Test Values (4): 3,149,126,942   3,292,608,610      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 164,630,431

Confidence Interval Values (5)

State Lower Limit: 3,127,978,179 (State Test Value minus Margin of Error Percent)
Local Test Value: 3,149,126,942 (Within Confidence Interval)
State Upper Limit: 3,457,239,041 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,217,360,275 (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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