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2010 Confidence Interval Detail
091/Grayson
091-905/Howe ISD

Category Summary

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

Stratum
Variance
A 30,511,292 0.9847 30,985,368 11 431 .007986241
A 28,303,411 1.0017 28,255,377 12 268 .009091108
A 30,414,465 0.9884 30,771,413 12 221 .009219045
A 33,010,094 0.9810 33,649,433 12 168 .000911556
D3 47,952,816 1.1352 42,241,734 20 1,334 .183261452
F1 3,100,227 0.9197 3,370,911 8 32 .059321564
F1 3,958,165 1.0705 3,697,492 6 12 .132780699
F1 3,071,333 0.9285 3,307,844 4 6 .035315775
Random Totals: 180,321,803   176,279,572 85 2,472  
Catg J Exception Values: 6,755,732   6,589,523      
Catg D1 Exception Values: 5,944,008   4,693,766      
Catg F1 Exception Values: 3,242,337   2,324,803      
Total Test Values (4): 196,263,880   189,887,664      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 9,494,383

Confidence Interval Values (5)

State Lower Limit: 180,393,281 (State Test Value minus Margin of Error Percent)
Local Test Value: 196,263,880 (Within Confidence Interval)
State Upper Limit: 199,382,047 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 196,271,441 (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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