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2008 Confidence Interval Detail
043/Collin
043-912/Prosper ISD

Category Summary

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

Stratum
Variance
A 227,340,205 0.9612 236,517,067 23 1,410 .003698586
A 256,678,981 1.0104 254,036,996 23 964 .002528654
A 263,465,848 0.9704 271,502,317 24 636 .002678915
A 267,301,820 1.0006 267,141,535 25 375 .000629863
D3 152,886,452 0.9901 154,415,162 22 935 .008104792
F1 13,748,626 0.7588 18,118,906 10 96 .228659865
F1 12,947,463 0.9870 13,117,997 6 18 .007156181
F1 14,318,170 0.9480 15,103,555 5 10 .014381136
Random Totals: 1,208,687,565   1,229,953,535 138 4,444  
Catg D1 Exception Values: 2,883,802   3,001,832      
Catg F1 Exception Values: 33,306,111   34,032,890      
Total Test Values (4): 1,244,877,478   1,266,988,257      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 63,349,413

Confidence Interval Values (5)

State Lower Limit: 1,203,638,844 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,244,877,478 (Within Confidence Interval)
State Upper Limit: 1,330,337,670 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,590,729,151 (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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