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2009 Confidence Interval Detail
091/Grayson
091-909/Whitesboro ISD

Category Summary

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

Stratum
Variance
A 47,956,206 0.9221 52,007,598 14 1,228 .091311051
A 51,548,301 0.9901 52,063,732 19 673 .041643082
A 49,549,617 0.9646 51,368,046 18 430 .019567417
A 50,751,380 0.9811 51,729,059 15 275 .025111885
D3 108,452,175 0.9657 112,304,209 20 2,909 .018861106
F1 8,313,847 0.8483 9,800,598 17 89 .058234360
F1 9,202,518 0.8441 10,902,166 7 34 .068107419
F1 11,626,410 0.9142 12,717,578 10 20 .027415005
G1 4,820,390 1.0772 4,474,926 6 41 .006796637
G1 4,766,124 1.0177 4,683,231 5 15 .010947110
G1 4,683,696 1.1689 4,006,926 4 8 .057065257
G1 4,237,517 1.0718 3,953,645 2 3 .000386307
Random Totals: 355,908,181   370,011,714 137 5,725  
Catg D1 Exception Values: 6,036,086   4,324,804      
Catg F1 Exception Values: 9,203,065   9,618,026      
Catg G1 Exception Values: 5,308,435   5,123,270      
Total Test Values (4): 376,455,767   389,077,814      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 19,453,891

Confidence Interval Values (5)

State Lower Limit: 369,623,923 (State Test Value minus Margin of Error Percent)
Local Test Value: 376,455,767 (Within Confidence Interval)
State Upper Limit: 408,531,705 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 416,120,763 (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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