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2010 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 161,106,423 1.0217 157,684,666 52 1,456 .004162120
A 156,081,760 1.0021 155,754,675 47 1,127 .003566314
A 153,720,079 0.9970 154,182,627 45 908 .008520000
A 145,246,726 1.0166 142,875,001 27 574 .008789911
D3 69,956,726 1.0553 66,290,842 17 1,099 .014303240
F1 14,144,640 0.9875 14,323,686 9 77 .007357541
F1 14,298,953 0.9995 14,306,106 7 28 .008635241
F1 13,508,966 0.8639 15,637,187 6 14 .019648289
F1 13,810,620 0.9331 14,800,793 3 5 .006836471
Random Totals: 741,874,893   735,855,583 213 5,288  
Catg J Exception Values: 33,502,385   32,839,540      
Catg D1 Exception Values: 1,997,017   1,921,989      
Total Test Values (4): 777,374,295   770,617,112      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 38,530,856

Confidence Interval Values (5)

State Lower Limit: 732,086,256 (State Test Value minus Margin of Error Percent)
Local Test Value: 777,374,295 (Within Confidence Interval)
State Upper Limit: 809,147,968 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 801,673,324 (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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