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2009 Confidence Interval Detail
079/Fort Bend
079-906/Needville ISD

Category Summary

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

Stratum
Variance
A 102,458,630 0.9592 106,816,754 9 1,446 .001958868
A 90,632,330 0.9800 92,481,969 9 724 .003933208
A 102,626,490 0.9615 106,735,819 11 600 .004650389
A 105,537,165 0.9769 108,032,721 8 416 .009812974
D3 105,641,535 0.9286 113,764,306 15 4,355 .042004630
Random Totals: 506,896,150   527,831,569 52 7,541  
Catg J Exception Values: 26,853,580   20,169,830      
Catg D1 Exception Values: 22,874,070   19,081,851      
Total Test Values (4): 556,623,800   567,083,250      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 28,354,163

Confidence Interval Values (5)

State Lower Limit: 538,729,087 (State Test Value minus Margin of Error Percent)
Local Test Value: 556,623,800 (Within Confidence Interval)
State Upper Limit: 595,437,413 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 587,557,890 (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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