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2009 Confidence Interval Detail
242/Wheeler
242-902/Shamrock ISD

Category Summary

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

Stratum
Variance
A 7,711,060 0.7096 10,866,770 11 394 .197656386
A 7,905,690 0.8976 8,807,587 8 167 .004205170
A 7,927,060 1.0032 7,901,774 10 116 .039056748
A 7,836,420 0.9474 8,271,501 8 70 .007115933
D3 12,989,360 0.8949 14,514,873 18 1,412 .053013329
F1 3,773,810 0.9004 4,191,259 15 93 .031372145
F1 4,016,690 0.8894 4,516,179 10 16 .055137097
G1 14,445,480 0.9994 14,454,152 14 166 .042625559
G1 14,604,350 1.0226 14,281,586 12 53 .029596282
G1 15,048,960 1.0136 14,847,040 7 13 .015606104
L1 2,602,600 1.0056 2,588,107 7 104 .000967676
L1 2,547,410 0.9688 2,629,449 5 21 .020438209
L1 2,273,330 1.0586 2,147,487 4 9 .014816532
Random Totals: 103,682,220   110,017,764 129 2,634  
Catg J Exception Values: 6,835,138   6,804,665      
Catg D1 Exception Values: 10,725,560   9,531,527      
Catg F1 Exception Values: 6,731,730   7,877,504      
Catg G1 Exception Values: 13,212,540   13,224,737      
Catg L1 Exception Values: 2,424,640   2,389,854      
Total Test Values (4): 143,611,828   149,846,051      

Margin of Error

Margin of Error Percent: 5.0000003
Margin of Error Value: 7,492,303

Confidence Interval Values (5)

State Lower Limit: 142,353,748 (State Test Value minus Margin of Error Percent)
Local Test Value: 143,611,828 (Within Confidence Interval)
State Upper Limit: 157,338,354 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 154,363,225 (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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