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2007 Confidence Interval Detail
014/Bell
014-910/Troy ISD

Category Summary

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

Stratum
Variance
A 26,155,525 0.9689 26,995,072 17 425 .054712742
A 26,113,452 0.9839 26,540,758 14 272 .010056115
A 26,176,295 1.0257 25,520,420 14 201 .025909258
A 26,029,792 1.0380 25,076,871 14 141 .009815861
D3 69,878,786 1.0350 67,515,735 20 2,412 .025648897
Random Totals: 174,353,850   171,648,856 79 3,451  
Catg J Exception Values: 20,905,357   20,870,376      
Catg D1 Exception Values: 10,327,848   9,275,623      
Total Test Values (4): 205,587,055   201,794,855      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 10,089,743

Confidence Interval Values (5)

State Lower Limit: 191,705,112 (State Test Value minus Margin of Error Percent)
Local Test Value: 205,587,055 (Within Confidence Interval)
State Upper Limit: 211,884,598 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 210,409,829 (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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