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2007 Confidence Interval Detail
043/Collin
043-902/Anna ISD

Category Summary

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

Stratum
Variance
A 80,898,721 0.9892 81,781,966 23 729 .004607770
A 80,871,073 0.9876 81,886,465 25 546 .004912230
A 80,965,167 0.9951 81,363,850 25 471 .002620468
A 80,748,363 1.0158 79,492,383 25 351 .002174357
D3 77,137,039 0.8400 91,829,808 15 1,784 .084492130
Random Totals: 400,620,363   416,354,472 113 3,881  
Catg D1 Exception Values: 3,817,887   3,563,020      
Total Test Values (4): 404,438,250   419,917,492      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 20,995,875

Confidence Interval Values (5)

State Lower Limit: 398,921,617 (State Test Value minus Margin of Error Percent)
Local Test Value: 404,438,250 (Within Confidence Interval)
State Upper Limit: 440,913,367 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 483,177,652 (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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