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2010 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 1,428,389,595 0.9859 1,448,817,928 52 7,584 .013437430
A 1,467,552,570 1.0156 1,445,010,408 47 5,901 .011847876
A 1,544,118,940 1.0217 1,511,323,226 44 4,840 .014474136
A 1,573,207,898 0.9969 1,578,100,008 39 3,192 .021424233
F1 168,193,320 0.9956 168,936,641 11 145 .010595608
F1 167,357,090 1.0042 166,657,130 8 50 .012121358
F1 121,184,280 1.0246 118,274,722 6 12 .009175547
Random Totals: 6,470,003,693   6,437,120,063 207 21,724  
Catg J Exception Values: 45,538,053   36,014,937      
Catg D1 Exception Values: 1,776,470   2,193,139      
Catg F1 Exception Values: 40,419,820   40,087,307      
Total Test Values (4): 6,557,738,036   6,515,415,446      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 325,770,772

Confidence Interval Values (5)

State Lower Limit: 6,189,644,674 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,557,738,036 (Within Confidence Interval)
State Upper Limit: 6,841,186,218 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,253,354,275 (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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