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2006 Confidence Interval Detail
113/Houston
113-902/Grapeland ISD

Category Summary

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

Stratum
Variance
A 13,659,202 0.9940 13,741,652 11 409 .035048770
A 13,632,323 0.9372 14,545,799 14 225 .017288734
A 13,681,124 0.9285 14,734,652 14 157 .058128229
A 13,548,145 0.9820 13,796,482 11 84 .004772589
D3 54,021,500 0.8611 62,735,455 40 4,107 .074453854
G1 46,868,229 1.0660 43,966,444 8 50 .007397544
Random Totals: 155,410,523   163,520,484 98 5,032  
Catg J Exception Values: 7,350,520   8,077,388      
Catg D1 Exception Values: 15,211,990   15,736,188      
Total Test Values (4): 177,973,033   187,334,060      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 9,366,703

Confidence Interval Values (5)

State Lower Limit: 177,967,357 (State Test Value minus Margin of Error Percent)
Local Test Value: 177,973,033 (Within Confidence Interval)
State Upper Limit: 196,700,763 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 210,474,749 (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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