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2010 Confidence Interval Detail
039/Clay
039-903/Petrolia ISD

Category Summary

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

Stratum
Variance
A 11,489,820 1.0640 10,798,703 14 268 .029914321
A 11,804,720 0.8781 13,443,480 12 144 .027696356
A 12,637,890 0.9444 13,381,925 11 92 .025594165
A 11,895,960 1.0138 11,734,030 10 59 .039895074
D3 21,870,540 0.9949 21,982,652 19 1,329 .010096127
Random Totals: 69,698,930   71,340,790 66 1,892  
Catg J Exception Values: 4,167,544   4,322,566      
Catg D1 Exception Values: 8,146,570   8,422,795      
Total Test Values (4): 82,013,044   84,086,151      

Margin of Error

Margin of Error Percent: 5.0000005
Margin of Error Value: 4,204,308

Confidence Interval Values (5)

State Lower Limit: 79,881,843 (State Test Value minus Margin of Error Percent)
Local Test Value: 82,013,044 (Within Confidence Interval)
State Upper Limit: 88,290,459 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 90,843,233 (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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