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2011 Confidence Interval Detail
072/Erath
072-904/Bluff Dale ISD

Category Summary

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

Stratum
Variance
A 7,654,050 1.0179 7,519,452 10 91 .006813314
A 7,657,860 0.9369 8,173,615 10 45 .006345818
A 7,566,770 0.9497 7,967,537 10 35 .008512070
A 8,092,640 0.9785 8,270,455 10 28 .006025037
C 5,643,750 0.9149 6,168,707 11 351 .037209829
C 5,000,700 1.0076 4,962,981 13 239 .037793858
C 6,676,630 1.0213 6,537,384 12 221 .065051821
C 3,588,840 1.0364 3,462,794 12 78 .008476226
D3 30,539,620 1.0063 30,348,425 24 740 .045498090
G1 2,518,140 0.9961 2,527,999 9 23 .129756472
Random Totals: 84,939,000   85,939,349 121 1,851  
Catg J Exception Values: 5,850,868   5,847,212      
Catg D1 Exception Values: 3,567,310   3,266,881      
Total Test Values (4): 94,357,178   95,053,442      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 4,752,672

Confidence Interval Values (5)

State Lower Limit: 90,300,770 (State Test Value minus Margin of Error Percent)
Local Test Value: 94,357,178 (Within Confidence Interval)
State Upper Limit: 99,806,114 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 117,990,501 (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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