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2010 Confidence Interval Detail
090/Gray
090-903/McLean ISD

Category Summary

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

Stratum
Variance
A 2,495,290 0.9157 2,725,008 8 187 .017049772
A 2,282,250 0.9268 2,462,505 9 88 .042449571
A 2,753,120 0.8916 3,087,842 8 60 .008925392
A 2,377,970 1.0059 2,364,022 6 25 .013871375
G1 21,723,538 0.9868 22,014,124 15 221 .026155312
G1 21,670,544 1.0508 20,622,901 14 118 .026497662
G1 21,928,155 1.0094 21,723,950 13 68 .016881038
G1 21,282,272 1.0810 19,687,578 10 27 .011821821
Random Totals: 96,513,139   94,687,930 83 794  
Catg J Exception Values: 4,718,584   5,412,081      
Catg D1 Exception Values: 4,864,710   9,106,762      
Total Test Values (4): 106,096,433   109,206,773      

Margin of Error

Margin of Error Percent: 5.0000003
Margin of Error Value: 5,460,339

Confidence Interval Values (5)

State Lower Limit: 103,746,434 (State Test Value minus Margin of Error Percent)
Local Test Value: 106,096,433 (Within Confidence Interval)
State Upper Limit: 114,667,112 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 130,596,581 (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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