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2008 Confidence Interval Detail
168/Mitchell
168-903/Westbrook ISD

Category Summary

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

Stratum
Variance
A 5,240,610 0.6607 7,931,906 21 215 .091984929
A 5,423,610 0.9242 5,868,438 13 124 .030186595
A 5,808,310 0.8967 6,477,428 11 87 .006152461
A 6,169,690 0.8012 7,700,562 14 51 .028777621
G1 82,079,987 0.9679 84,802,136 6 9 .008918837
Random Totals: 104,722,207   112,780,470 65 486  
Catg D1 Exception Values: 10,465,610   12,013,949      
Catg G1 Exception Values: 315,009,668   322,143,439      
Total Test Values (4): 430,197,485   446,937,858      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 22,346,893

Confidence Interval Values (5)

State Lower Limit: 424,590,965 (State Test Value minus Margin of Error Percent)
Local Test Value: 430,197,485 (Within Confidence Interval)
State Upper Limit: 469,284,751 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 476,023,330 (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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