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2008 Confidence Interval Detail
213/Somervell
213-901/Glen Rose ISD

Category Summary

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

Stratum
Variance
A 50,742,062 0.8780 57,792,781 21 714 .045950250
A 49,280,777 0.9600 51,334,143 16 357 .026632270
A 60,534,023 0.9817 61,662,446 26 287 .007867042
A 53,679,760 1.0233 52,457,500 16 171 .038648485
D3 156,546,409 0.7354 212,872,463 39 2,802 .403132437
F1 11,219,815 0.7353 15,258,826 15 118 .076388359
F1 12,234,556 0.8697 14,067,559 14 43 .035518785
F1 12,331,775 0.7643 16,134,731 10 16 .103964580
F1 13,985,122 0.8266 16,918,851 4 6 .096128161
G1 41,852,474 1.0043 41,673,279 20 47 .016045979
Random Totals: 462,406,773   540,172,579 181 4,561  
Catg J Exception Values: 32,370,403   32,324,188      
Catg D1 Exception Values: 5,644,098   5,496,622      
Total Test Values (4): 500,421,274   577,993,389      

Margin of Error

Margin of Error Percent: 7.4733895
Margin of Error Value: 43,195,697

Confidence Interval Values (5)

Local Test Value: 500,421,274 (Outside Confidence Interval)
State Lower Limit: 534,797,692 (State Test Value minus Margin of Error Percent)
State Upper Limit: 621,189,086 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 3,134,380,632 (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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