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2011 Confidence Interval Detail
060/Delta
060-902/Cooper ISD

Category Summary

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

Stratum
Variance
A 14,709,190 0.6853 21,463,870 10 540 .281299293
A 15,240,370 0.9119 16,712,765 10 309 .023089678
A 15,588,980 0.9076 17,176,047 11 207 .012793104
A 15,297,210 0.9491 16,117,596 10 116 .004608043
D3 51,641,431 0.9579 53,911,088 26 3,570 .114518391
Random Totals: 112,477,181   125,381,366 67 4,742  
Catg J Exception Values: 785,390   860,329      
Catg D1 Exception Values: 13,822,580   10,367,659      
Total Test Values (4): 127,085,151   136,609,354      

Margin of Error

Margin of Error Percent: 7.5160241
Margin of Error Value: 10,267,592

Confidence Interval Values (5)

State Lower Limit: 126,341,762 (State Test Value minus Margin of Error Percent)
Local Test Value: 127,085,151 (Within Confidence Interval)
State Upper Limit: 146,876,946 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 149,941,056 (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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