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2008 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 113,154,520 0.9763 115,901,383 62 1,884 .008613901
A 113,660,950 0.9533 119,228,942 58 1,141 .018364920
A 132,219,730 0.9815 134,711,900 63 987 .003295474
A 135,368,310 0.9676 139,901,106 24 585 .011907357
D3 205,515,340 0.8236 249,532,953 52 4,471 .107521147
F1 53,582,220 1.0237 52,341,721 11 349 .021509370
F1 57,007,540 1.0213 55,818,604 10 134 .004293117
F1 49,733,530 0.9948 49,993,496 9 48 .004194805
F1 64,967,290 0.8562 75,878,638 6 17 .083671126
L1 20,954,250 0.9921 21,121,107 7 432 .002196834
L1 23,953,060 1.0101 23,713,553 7 111 .002204240
L1 20,818,970 1.0181 20,448,846 7 31 .001503369
L1 24,567,710 0.9990 24,592,302 5 11 .000139275
Random Totals: 1,015,503,420   1,083,184,551 321 10,201  
Catg D1 Exception Values: 16,517,160   11,406,241      
Total Test Values (4): 1,032,020,580   1,094,590,792      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 54,729,540

Confidence Interval Values (5)

Local Test Value: 1,032,020,580 (Outside Confidence Interval)
State Lower Limit: 1,039,861,252 (State Test Value minus Margin of Error Percent)
State Upper Limit: 1,149,320,332 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,228,224,841 (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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