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2007 Confidence Interval Detail
091/Grayson
091-910/Whitewright ISD

Category Summary

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

Stratum
Variance
A 15,891,210 0.9705 16,374,250 15 356 .073338129
A 15,862,491 0.9726 16,309,368 16 209 .017147797
A 15,875,086 0.9304 17,062,646 15 150 .012729325
A 15,803,828 1.0399 15,197,450 12 89 .030444548
D3 49,366,060 0.9395 52,545,035 21 1,862 .019471963
F1 1,894,081 0.7159 2,645,734 7 43 .037561406
F1 1,985,318 0.7467 2,658,789 6 18 .105311211
F1 2,091,981 0.8783 2,381,852 4 8 .004076772
Random Totals: 118,770,055   125,175,124 96 2,735  
Catg J Exception Values: 8,146,000   8,295,428      
Catg D1 Exception Values: 5,948,598   4,379,973      
Catg F1 Exception Values: 2,189,746   1,988,509      
Total Test Values (4): 135,054,399   139,839,034      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 6,991,952

Confidence Interval Values (5)

State Lower Limit: 132,847,082 (State Test Value minus Margin of Error Percent)
Local Test Value: 135,054,399 (Within Confidence Interval)
State Upper Limit: 146,830,986 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 132,737,780 (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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