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2006 Confidence Interval Detail
177/Nolan
177-903/Blackwell ISD

Category Summary

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

Stratum
Variance
A 2,443,569 0.8022 3,046,085 7 168 .089118375
A 2,446,043 0.9820 2,490,879 6 82 .051927193
A 2,471,660 1.0294 2,401,069 6 50 .007466300
A 2,393,702 1.1515 2,078,769 8 28 .012331167
D3 16,953,545 0.9457 17,926,980 10 1,591 .111656562
G1 18,898,440 1.0176 18,571,580 6 58 .020071476
G1 19,055,320 1.0015 19,026,780 5 18 .014831718
G1 18,311,357 0.9933 18,434,871 4 8 .008507249
G1 17,545,760 1.0844 16,180,155 3 4 .013719798
Random Totals: 100,519,396   100,157,168 55 2,007  
Catg J Exception Values: 11,139,922   10,396,218      
Catg D1 Exception Values: 11,352,739   12,231,900      
Total Test Values (4): 123,012,057   122,785,286      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 6,139,264

Confidence Interval Values (5)

State Lower Limit: 116,646,022 (State Test Value minus Margin of Error Percent)
Local Test Value: 123,012,057 (Within Confidence Interval)
State Upper Limit: 128,924,550 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 237,531,620 (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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