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2012 Confidence Interval Detail
109/Hill
109-913/Blum ISD

Category Summary

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

Stratum
Variance
A 4,015,730 0.9731 4,126,739 9 121 .003784205
A 3,824,640 0.9507 4,022,973 9 68 .003755619
A 4,154,150 1.0000 4,154,150 8 52 .000338409
A 3,332,360 0.9612 3,466,875 7 25 .001112889
D3 38,459,280 0.9754 39,429,239 16 1,491 .024659887
G1 5,875,475 0.7583 7,748,220 7 23 .360133324
G1 6,088,883 1.0608 5,739,897 5 10 .004808097
G1 5,625,597 1.0962 5,131,907 3 5 .001568508
G1 4,872,037 1.1211 4,345,765 2 3 .050141557
Random Totals: 76,248,152   78,165,765 66 1,798  
Catg J Exception Values: 17,028,254   18,631,119      
Catg D1 Exception Values: 4,778,021   3,608,791      
Total Test Values (4): 98,054,427   100,405,675      

Margin of Error

Margin of Error Percent: 5.0000002
Margin of Error Value: 5,020,284

Confidence Interval Values (5)

State Lower Limit: 95,385,391 (State Test Value minus Margin of Error Percent)
Local Test Value: 98,054,427 (Within Confidence Interval)
State Upper Limit: 105,425,959 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 117,086,713 (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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