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2009 Confidence Interval Detail
187/Polk
187-907/Livingston ISD

Category Summary

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

Stratum
Variance
A 138,482,119 0.8059 171,835,363 34 3,626 .126785689
A 141,884,358 0.8312 170,698,217 19 1,775 .191780567
A 159,918,695 0.8074 198,066,256 19 1,243 .135274358
A 219,639,292 0.7936 276,763,221 20 853 .050782632
C 17,832,785 0.6843 26,059,893 16 8,760 .814938675
C 17,350,834 0.5838 29,720,510 17 2,772 .393147415
C 16,901,304 0.8361 20,214,453 17 872 .175175603
C 17,883,298 0.7572 23,617,668 16 164 .428974648
D3 104,069,872 0.8498 122,463,959 20 4,238 .060514102
F1 43,864,613 0.9292 47,206,859 17 312 .013544748
F1 47,490,495 0.8977 52,902,412 17 89 .043517730
F1 50,615,287 0.8926 56,705,453 14 36 .148835911
L1 16,658,890 0.8061 20,666,034 9 476 .411942411
L1 15,324,753 0.7980 19,203,951 8 79 .043603722
L1 17,427,295 0.9411 18,518,006 7 23 .043809728
Random Totals: 1,025,343,890   1,254,642,255 250 25,318  
Catg D1 Exception Values: 33,399,340   33,487,308      
Catg F1 Exception Values: 37,779,688   41,209,152      
Catg L1 Exception Values: 17,206,296   17,606,186      
Total Test Values (4): 1,113,729,214   1,346,944,901      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 67,347,245

Confidence Interval Values (5)

Local Test Value: 1,113,729,214 (Outside Confidence Interval)
State Lower Limit: 1,279,597,656 (State Test Value minus Margin of Error Percent)
State Upper Limit: 1,414,292,146 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,334,103,974 (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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