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2009 Confidence Interval Detail
090/Gray
090-903/McLean ISD

Category Summary

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

Stratum
Variance
A 2,232,170 0.9740 2,291,756 7 171 .006392479
A 2,426,860 0.9392 2,583,965 7 96 .063696603
A 2,205,300 0.9934 2,219,952 6 50 .043715302
A 2,494,210 1.0458 2,384,978 6 27 .029065821
G1 25,436,667 0.9653 26,351,048 9 222 .028552779
G1 25,506,701 1.0283 24,804,727 9 121 .025692223
G1 25,335,540 0.9657 26,235,415 8 73 .029822485
G1 25,172,330 1.0354 24,311,696 7 34 .004190103
Random Totals: 110,809,778   111,183,537 59 794  
Catg J Exception Values: 5,122,160   4,412,644      
Catg D1 Exception Values: 4,727,480   8,218,848      
Total Test Values (4): 120,659,418   123,815,029      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 6,190,751

Confidence Interval Values (5)

State Lower Limit: 117,624,278 (State Test Value minus Margin of Error Percent)
Local Test Value: 120,659,418 (Within Confidence Interval)
State Upper Limit: 130,005,780 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 149,525,376 (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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