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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 0.9267 54,755,651 14 714 .029253565
A 49,280,777 0.9662 51,004,737 16 357 .022504830
A 60,534,023 0.9945 60,868,801 19 287 .003512933
A 53,679,760 1.0233 52,457,500 16 171 .038648485
D3 156,546,409 0.9337 167,662,428 26 2,802 .080526496
F1 11,219,815 0.8148 13,770,023 14 118 .020781697
F1 12,234,556 0.8853 13,819,672 14 43 .034663573
F1 12,331,775 0.8232 14,980,290 9 16 .079754317
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   487,911,232 152 4,561  
Catg J Exception Values: 32,370,403   32,258,276      
Catg D1 Exception Values: 5,644,098   5,496,622      
Total Test Values (4): 500,421,274   525,666,130      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 26,283,307

Confidence Interval Values (5)

State Lower Limit: 499,382,823 (State Test Value minus Margin of Error Percent)
Local Test Value: 500,421,274 (Within Confidence Interval)
State Upper Limit: 551,949,437 (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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