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2007 Confidence Interval Detail
072/Erath
072-903/Stephenville ISD

Category Summary

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

Stratum
Variance
A 116,413,143 0.9131 127,492,217 58 1,920 .038012399
A 116,464,939 0.9385 124,096,898 50 1,146 .013388394
A 116,320,486 0.9552 121,776,053 41 847 .015205028
A 116,330,894 0.9951 116,903,722 42 497 .011494342
B 13,083,193 0.9301 14,066,437 11 108 .006970490
B 13,578,571 0.7203 18,851,272 9 22 .067795390
B 13,601,746 0.9324 14,587,887 4 7 .005819311
D3 195,085,990 0.9692 201,285,586 22 4,481 .164375931
F1 52,277,391 0.9095 57,479,264 10 326 .025868321
F1 52,636,412 0.8080 65,144,074 9 121 .071715767
F1 53,001,310 0.9350 56,685,893 8 51 .007852085
F1 50,730,065 0.8683 58,424,583 7 16 .016013208
L1 20,463,130 1.0211 20,040,280 7 405 .014482615
L1 20,470,880 1.0251 19,969,642 6 90 .000657452
L1 21,345,723 1.0378 20,568,243 6 28 .010231144
L1 19,196,094 1.0321 18,599,064 3 5 .003543616
Random Totals: 990,999,967   1,055,971,115 293 10,070  
Catg D1 Exception Values: 14,359,810   11,440,723      
Catg B Exception Values: 13,762,200   17,743,993      
Total Test Values (4): 1,019,121,977   1,085,155,831      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 54,257,792

Confidence Interval Values (5)

Local Test Value: 1,019,121,977 (Outside Confidence Interval)
State Lower Limit: 1,030,898,039 (State Test Value minus Margin of Error Percent)
State Upper Limit: 1,139,413,623 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,154,074,431 (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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