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2009 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 1,209,083,760 0.9834 1,229,493,350 49 6,543 .003743771
A 1,283,023,470 0.9611 1,334,953,147 52 5,340 .004146124
A 1,458,601,250 0.9608 1,518,111,209 49 4,748 .003099535
A 1,532,937,076 0.9583 1,599,642,154 50 3,229 .004310783
F1 141,102,404 1.0012 140,933,284 10 127 .006064623
F1 132,258,710 0.9185 143,994,241 6 49 .035980692
F1 96,163,300 0.9550 100,694,555 5 15 .004761835
F1 260,479,373 1.0156 256,478,311 4 10 .010193876
Random Totals: 6,113,649,343   6,324,300,251 225 20,061  
Catg D1 Exception Values: 1,912,470   2,132,449      
Catg F1 Exception Values: 143,168,370   143,870,905      
Total Test Values (4): 6,258,730,183   6,470,303,605      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 323,515,180

Confidence Interval Values (5)

State Lower Limit: 6,146,788,425 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,258,730,183 (Within Confidence Interval)
State Upper Limit: 6,793,818,785 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 6,837,415,289 (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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