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2007 Confidence Interval Detail
025/Brown
025-906/Zephyr ISD

Category Summary

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

Stratum
Variance
A 993,695 1.0118 982,106 8 48 .003084483
A 1,008,580 0.8640 1,167,338 7 25 .057492079
A 1,026,869 0.9674 1,061,473 6 16 .003206354
A 938,847 0.9708 967,086 5 9 .000101568
D3 16,333,109 1.0808 15,112,055 28 822 .075789173
Random Totals: 20,301,100   19,290,058 54 920  
Catg J Exception Values: 6,518,080   6,689,592      
Catg D1 Exception Values: 3,304,500   2,809,320      
Total Test Values (4): 30,123,680   28,788,970      

Margin of Error

Margin of Error Percent: 5.4341611
Margin of Error Value: 1,564,439

Confidence Interval Values (5)

State Lower Limit: 27,224,531 (State Test Value minus Margin of Error Percent)
Local Test Value: 30,123,680 (Within Confidence Interval)
State Upper Limit: 30,353,409 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 29,318,640 (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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