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2008 Confidence Interval Detail
079/Fort Bend
101-914/Katy ISD

Category Summary

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

Stratum
Variance
A 5,040,406,176 0.9771 5,158,536,666 50 19,953 .003729845
F1 660,977,080 0.9233 715,885,498 10 2,010 .022158836
Random Totals: 5,701,383,256   5,874,422,164 60 21,963  
Catg D1 Exception Values: 1,799,630   2,179,879      
Total Test Values (4): 5,703,182,886   5,876,602,043      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 293,830,102

Confidence Interval Values (5)

State Lower Limit: 5,582,771,941 (State Test Value minus Margin of Error Percent)
Local Test Value: 5,703,182,886 (Within Confidence Interval)
State Upper Limit: 6,170,432,145 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 5,967,310,102 (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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