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2007 Confidence Interval Detail
091/Grayson
091-914/Sadler-Southmayd ISD

Category Summary

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

Stratum
Variance
A 31,247,075 0.8303 37,633,476 15 548 .100383348
A 31,377,920 0.9604 32,671,720 11 255 .006631274
A 31,157,794 0.9682 32,181,155 18 164 .044783840
A 31,195,991 1.0003 31,186,635 6 77 .000948291
D3 55,999,123 0.8429 66,436,259 27 2,686 .470989010
G1 18,798,133 0.8711 21,579,765 6 39 .080344949
G1 21,406,474 0.9874 21,679,637 4 9 .002898451
Random Totals: 221,182,510   243,368,647 87 3,778  
Catg D1 Exception Values: 8,475,068   5,935,258      
Catg G1 Exception Values: 58,211,043   55,193,459      
Total Test Values (4): 287,868,621   304,497,364      

Margin of Error

Margin of Error Percent: 6.3349107
Margin of Error Value: 19,289,636

Confidence Interval Values (5)

State Lower Limit: 285,207,728 (State Test Value minus Margin of Error Percent)
Local Test Value: 287,868,621 (Within Confidence Interval)
State Upper Limit: 323,787,000 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 317,729,821 (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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