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2008 Confidence Interval Detail
072/Erath
072-910/Morgan Mill ISD

Category Summary

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

Stratum
Variance
A 1,537,470 1.0544 1,458,147 8 39 .039443807
A 1,439,600 0.9224 1,560,711 8 23 .062759249
A 1,381,060 0.9440 1,462,987 6 17 .012466412
A 1,391,430 0.9927 1,401,662 6 10 .003022114
D3 42,395,010 1.0900 38,894,505 48 1,042 .059513852
G1 4,470,590 1.0382 4,306,097 5 22 .006332507
G1 4,927,460 1.0059 4,898,559 4 9 .005868929
G1 5,124,150 1.0366 4,943,228 3 5 .003377171
Random Totals: 62,666,770   58,925,896 88 1,167  
Catg J Exception Values: 1,696,808   1,523,092      
Catg D1 Exception Values: 5,191,800   3,624,435      
Catg G1 Exception Values: 3,126,540   2,611,406      
Total Test Values (4): 72,681,918   66,684,829      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 3,334,241

Confidence Interval Values (5)

State Lower Limit: 63,350,588 (State Test Value minus Margin of Error Percent)
State Upper Limit: 70,019,070 (State Test Value plus Margin of Error Percent)
Local Test Value: 72,681,918 (Outside Confidence Interval)
Value Assigned (6): 64,653,543 (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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