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2007 Confidence Interval Detail
199/Rockwall
199-902/Royse City ISD

Category Summary

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

Stratum
Variance
A 148,191,042 1.1432 129,628,273 18 1,297 .056993240
A 147,994,446 1.0118 146,268,478 26 914 .007243507
A 148,146,610 1.0035 147,629,905 24 742 .008841976
A 147,941,480 1.0737 137,786,607 25 505 .010882306
D3 125,677,521 1.0165 123,637,502 20 2,284 .058621454
Random Totals: 717,951,099   684,950,765 113 5,742  
Catg J Exception Values: 37,048,625   36,842,723      
Catg D1 Exception Values: 3,532,617   3,724,112      
Total Test Values (4): 758,532,341   725,517,600      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 36,275,880

Confidence Interval Values (5)

State Lower Limit: 689,241,720 (State Test Value minus Margin of Error Percent)
Local Test Value: 758,532,341 (Within Confidence Interval)
State Upper Limit: 761,793,480 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 908,002,935 (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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