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2009 Confidence Interval Detail
156/Martin
058-909/Sands ISD

Category Summary

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

Stratum
Variance
D3 3,710,146 1.0167 3,649,204 22 450 .031978566
G1 17,525,770 1.0416 16,825,816 13 21 .008981307
G1 17,194,800 0.9900 17,368,485 6 7 .000902513
G1 18,567,740 1.0155 18,284,333 4 5 .003927508
Random Totals: 56,998,456   56,127,838 45 483  
Catg D1 Exception Values: 8,162,960   9,689,663      
Catg G1 Exception Values: 12,361,860   12,225,973      
Total Test Values (4): 77,523,276   78,043,474      

Margin of Error

Margin of Error Percent: 5.0000004
Margin of Error Value: 3,902,174

Confidence Interval Values (5)

State Lower Limit: 74,141,300 (State Test Value minus Margin of Error Percent)
Local Test Value: 77,523,276 (Within Confidence Interval)
State Upper Limit: 81,945,648 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 86,172,687 (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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