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2009 Confidence Interval Detail
086/Gillespie
086-902/Harper ISD

Category Summary

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

Stratum
Variance
A 9,799,319 0.9725 10,076,421 7 135 .041299162
A 9,162,790 1.0185 8,996,357 6 79 .012780742
A 9,110,641 0.9442 9,649,058 6 58 .006336537
A 11,548,690 0.9268 12,460,822 6 45 .009658386
D3 223,734,564 0.9823 227,766,023 26 3,847 .089544728
Random Totals: 263,356,004   268,948,681 51 4,164  
Catg D1 Exception Values: 8,392,022   9,304,242      
Total Test Values (4): 271,748,026   278,252,923      

Margin of Error

Margin of Error Percent: 9.6510070
Margin of Error Value: 26,854,209

Confidence Interval Values (5)

State Lower Limit: 251,398,714 (State Test Value minus Margin of Error Percent)
Local Test Value: 271,748,026 (Within Confidence Interval)
State Upper Limit: 305,107,132 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 240,716,485 (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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