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2011 Confidence Interval Detail
220/Tarrant
220-915/Azle ISD

Category Summary

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

Stratum
Variance
A 239,450,081 1.0192 234,939,247 15 2,755 .043712864
A 249,429,536 0.9834 253,639,959 15 1,663 .012435010
A 250,970,891 0.9674 259,428,252 15 1,041 .018373203
A 249,560,723 0.9978 250,110,967 15 618 .010678627
F1 26,943,156 0.8650 31,148,157 9 163 .057278753
F1 27,813,469 0.9340 29,778,875 9 72 .017315453
F1 31,853,265 0.8388 37,974,803 8 40 .067805608
F1 26,278,564 0.9385 28,000,601 5 10 .006002044
G1 59,898,803 1.0135 59,100,940 12 52 .012192623
G1 60,810,904 1.0572 57,520,719 8 25 .001920141
G1 61,387,678 1.0104 60,755,817 6 18 .004440132
G1 57,358,469 1.0146 56,533,086 5 11 .002728168
Random Totals: 1,341,755,539   1,358,931,423 122 6,468  
Catg D1 Exception Values: 499,900   281,586      
Total Test Values (4): 1,342,255,439   1,359,213,009      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 67,960,650

Confidence Interval Values (5)

State Lower Limit: 1,291,252,359 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,342,255,439 (Within Confidence Interval)
State Upper Limit: 1,427,173,659 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,420,915,462 (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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