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2008 Confidence Interval Detail
101/Harris
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 7,159,791,438 0.9961 7,187,823,951 84 45,721 .005085691
B 641,746,310 0.8935 718,238,735 13 110 .000243687
C 257,226,810 0.8135 316,197,677 19 3,398 .074810265
F1 3,265,675,618 0.9573 3,411,339,829 11 1,524 .001410140
L1 823,627,656 0.9607 857,320,346 24 5,639 .005453993
Random Totals: 12,148,067,832   12,490,920,538 151 56,392  
Catg D1 Exception Values: 2,630,434   2,674,282      
Total Test Values (4): 12,150,698,266   12,493,594,820      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 624,679,741

Confidence Interval Values (5)

State Lower Limit: 11,868,915,079 (State Test Value minus Margin of Error Percent)
Local Test Value: 12,150,698,266 (Within Confidence Interval)
State Upper Limit: 13,118,274,561 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 11,935,006,502 (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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