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2009 Confidence Interval Detail
048/Concho
048-903/Paint Rock ISD

Category Summary

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

Stratum
Variance
A 4,646,000 0.8239 5,639,034 11 151 .102041189
A 4,688,780 0.9516 4,927,259 12 63 .053371673
A 4,679,330 1.0275 4,554,092 11 32 .015526824
A 4,624,640 1.0186 4,540,192 8 14 .006625676
C 1,184,920 0.9984 1,186,819 8 173 .026244531
C 1,225,240 1.0382 1,180,158 6 75 .053142161
C 1,108,550 0.9861 1,124,176 6 33 .084090260
C 1,337,570 1.1681 1,145,082 4 15 .026256795
D3 10,106,710 0.8755 11,543,929 20 1,689 .148427294
G1 4,099,535 1.0274 3,990,203 15 43 .008205054
Random Totals: 37,701,275   39,830,944 101 2,288  
Catg J Exception Values: 2,544,370   2,426,567      
Catg D1 Exception Values: 13,917,210   15,260,527      
Catg G1 Exception Values: 3,604,547   3,668,336      
Total Test Values (4): 57,767,402   61,186,374      

Margin of Error

Margin of Error Percent: 5.0000005
Margin of Error Value: 3,059,319

Confidence Interval Values (5)

Local Test Value: 57,767,402 (Outside Confidence Interval)
State Lower Limit: 58,127,055 (State Test Value minus Margin of Error Percent)
State Upper Limit: 64,245,693 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 64,743,203 (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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