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2006 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 3,828,230 0.6788 5,639,702 6 219 .105504605
A 3,856,326 0.8436 4,571,273 11 122 .067966925
A 3,827,335 0.9238 4,143,034 6 82 .024357881
A 3,781,068 0.9380 4,030,989 8 46 .081534597
D3 4,430,660 0.9685 4,574,765 20 1,058 .065747330
G1 55,164,749 0.9923 55,592,814 5 17 .002090591
Random Totals: 74,888,368   78,552,577 56 1,544  
Catg D1 Exception Values: 8,688,620   10,382,393      
Catg G1 Exception Values: 224,805,413   222,782,075      
Total Test Values (4): 308,382,401   311,717,045      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 15,585,852

Confidence Interval Values (5)

State Lower Limit: 296,131,193 (State Test Value minus Margin of Error Percent)
Local Test Value: 308,382,401 (Within Confidence Interval)
State Upper Limit: 327,302,897 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 341,108,850 (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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