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2007 Confidence Interval Detail
043/Collin
043-908/Melissa ISD

Category Summary

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

Stratum
Variance
A 61,645,511 0.9800 62,903,583 25 441 .002874043
A 61,506,864 1.0036 61,286,234 25 252 .001821982
A 61,509,865 0.9915 62,037,181 24 179 .002432962
A 61,223,076 0.9816 62,370,697 11 121 .003673318
C 2,849,723 0.9305 3,062,572 7 185 .001631752
C 1,058,910 0.9918 1,067,665 6 47 .001041877
C 1,796,868 0.9564 1,878,783 6 51 .003540422
C 1,877,530 0.9794 1,917,021 6 26 .001770193
D3 37,963,084 0.8980 42,275,149 12 1,007 .035628158
L1 4,348,125 0.9968 4,362,084 7 42 .003230395
L1 5,418,448 0.9899 5,473,733 4 8 .000201286
L1 7,325,849 0.9370 7,818,409 2 4 .006832967
Random Totals: 308,523,853   316,453,111 135 2,363  
Catg D1 Exception Values: 1,697,236   1,569,845      
Total Test Values (4): 310,221,089   318,022,956      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 15,901,148

Confidence Interval Values (5)

State Lower Limit: 302,121,808 (State Test Value minus Margin of Error Percent)
Local Test Value: 310,221,089 (Within Confidence Interval)
State Upper Limit: 333,924,104 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 386,539,791 (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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