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2008 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 69,696,634 0.9680 72,000,655 19 596 .005150757
A 74,375,959 0.9901 75,119,643 24 401 .002756203
A 67,619,704 0.9872 68,496,459 23 263 .002543299
A 80,126,682 0.9871 81,173,824 8 204 .004097068
D3 38,838,845 0.9503 40,870,088 12 992 .034208377
Random Totals: 330,657,824   337,660,669 86 2,456  
Catg D1 Exception Values: 1,665,430   1,629,266      
Total Test Values (4): 332,323,254   339,289,935      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 16,964,497

Confidence Interval Values (5)

State Lower Limit: 322,325,438 (State Test Value minus Margin of Error Percent)
Local Test Value: 332,323,254 (Within Confidence Interval)
State Upper Limit: 356,254,432 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 422,146,302 (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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