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2007 Confidence Interval Detail
070/Ellis
070-912/Waxahachie ISD

Category Summary

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

Stratum
Variance
A 291,812,317 0.9044 322,658,466 7 3,369 .007080766
A 291,653,463 0.9410 309,939,918 12 2,186 .018231758
A 291,645,145 0.8682 335,919,310 8 1,619 .041544254
A 291,684,151 0.9835 296,577,683 10 998 .007811899
D3 137,187,875 0.8668 158,269,353 14 3,480 .035091892
F1 71,170,693 0.9301 76,519,399 8 283 .008779258
F1 71,975,253 0.9735 73,934,518 6 86 .010224762
F1 74,264,102 0.9158 81,092,053 7 32 .023016527
F1 66,146,158 0.9786 67,592,641 6 7 .003395023
L1 33,189,616 1.0201 32,535,649 9 347 .010659603
L1 33,761,193 0.7437 45,396,253 8 62 .103325474
L1 32,806,013 1.0026 32,720,939 5 13 .003419736
L1 32,267,177 0.9870 32,692,175 3 4 .000134049
Random Totals: 1,719,563,156   1,865,848,357 103 12,486  
Catg D1 Exception Values: 12,199,151   12,790,558      
Total Test Values (4): 1,731,762,307   1,878,638,915      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 93,931,946

Confidence Interval Values (5)

Local Test Value: 1,731,762,307 (Outside Confidence Interval)
State Lower Limit: 1,784,706,969 (State Test Value minus Margin of Error Percent)
State Upper Limit: 1,972,570,861 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,487,401,094 (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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