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2007 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 1,457,367 1.1141 1,308,111 6 36 .005705653
A 1,435,088 1.1374 1,261,727 5 22 .005998167
A 1,484,251 1.0929 1,358,085 5 17 .006327512
A 1,318,835 1.0835 1,217,199 6 9 .015119234
D3 39,098,970 0.9631 40,596,999 10 1,037 .066792635
G1 1,658,300 0.8606 1,926,911 5 19 .005501099
G1 1,764,760 0.9869 1,788,185 4 9 .006903882
G1 1,651,250 0.9629 1,714,872 3 5 .030006773
G1 1,322,430 0.8973 1,473,788 2 3 .002511604
Random Totals: 51,191,251   52,645,877 46 1,157  
Catg J Exception Values: 1,443,427   1,326,383      
Catg D1 Exception Values: 4,394,910   3,632,927      
Total Test Values (4): 57,029,588   57,605,187      

Margin of Error

Margin of Error Percent: 11.6199779
Margin of Error Value: 6,693,710

Confidence Interval Values (5)

State Lower Limit: 50,911,477 (State Test Value minus Margin of Error Percent)
Local Test Value: 57,029,588 (Within Confidence Interval)
State Upper Limit: 64,298,897 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 56,436,946 (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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