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2008 Confidence Interval Detail
156/Martin
156-905/Grady ISD

Category Summary

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

Stratum
Variance
D3 11,573,280 0.8358 13,846,949 19 1,391 .073910950
G1 127,695,500 0.9175 139,177,657 8 179 .063602059
G1 129,632,290 0.9396 137,965,400 7 60 .002931523
G1 132,415,309 1.2822 103,271,961 6 28 .162881424
G1 120,923,074 1.0277 117,663,787 4 8 .003632017
Random Totals: 522,239,453   511,925,754 44 1,666  
Catg D1 Exception Values: 13,782,190   23,047,731      
Total Test Values (4): 536,021,643   534,973,485      

Margin of Error

Margin of Error Percent: 7.4435169
Margin of Error Value: 39,820,842

Confidence Interval Values (5)

State Lower Limit: 495,152,643 (State Test Value minus Margin of Error Percent)
Local Test Value: 536,021,643 (Within Confidence Interval)
State Upper Limit: 574,794,327 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 591,606,307 (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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