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2011 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 6,551,510 0.9274 7,064,384 10 235 .040934807
A 6,730,310 0.9755 6,899,344 13 133 .002904027
A 7,654,690 0.9795 7,814,895 17 101 .002019478
A 8,062,060 0.9899 8,144,318 14 61 .001653711
G1 70,397,821 1.0256 68,640,621 3 4 .000939163
Random Totals: 99,396,391   98,563,562 57 534  
Catg D1 Exception Values: 11,436,400   13,075,126      
Catg G1 Exception Values: 442,637,502   444,372,245      
Total Test Values (4): 553,470,293   556,010,933      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 27,800,547

Confidence Interval Values (5)

State Lower Limit: 528,210,386 (State Test Value minus Margin of Error Percent)
Local Test Value: 553,470,293 (Within Confidence Interval)
State Upper Limit: 583,811,480 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 612,326,960 (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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