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2011 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 1,680,730 0.9713 1,730,392 10 39 .008907970
A 1,827,610 0.9903 1,845,511 11 27 .003437911
A 1,835,650 1.0285 1,784,784 10 18 .006134705
A 1,404,060 1.0074 1,393,746 5 8 .003397519
D3 47,816,550 0.9720 49,193,981 21 1,045 .040107822
G1 1,874,310 0.8534 2,196,285 8 34 .126962632
G1 1,939,800 1.0457 1,855,025 6 15 .046402031
G1 2,004,760 1.0075 1,989,836 5 9 .051593509
G1 1,617,810 1.0539 1,535,070 3 5 .005754437
Random Totals: 62,001,280   63,524,630 79 1,200  
Catg J Exception Values: 46,818   45,759      
Catg D1 Exception Values: 4,366,830   4,164,655      
Total Test Values (4): 66,414,928   67,735,044      

Margin of Error

Margin of Error Percent: 6.3197892
Margin of Error Value: 4,280,712

Confidence Interval Values (5)

State Lower Limit: 63,454,332 (State Test Value minus Margin of Error Percent)
Local Test Value: 66,414,928 (Within Confidence Interval)
State Upper Limit: 72,015,756 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 70,407,678 (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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