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2009 Confidence Interval Detail
158/Matagorda
158-901/Bay City ISD

Category Summary

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

Stratum
Variance
A 102,855,800 1.0268 100,171,212 19 1,889 .023263691
A 102,953,315 1.0109 101,843,224 23 1,060 .023960040
A 123,670,826 1.0171 121,591,609 26 957 .029270056
A 121,234,580 0.9992 121,331,645 13 582 .004531978
F1 31,899,438 0.9364 34,066,038 9 326 .029300130
F1 33,123,691 0.8793 37,670,523 9 130 .019648809
F1 31,107,822 0.8519 36,515,814 7 46 .008738106
F1 35,042,500 0.9471 36,999,789 5 15 .003534918
G1 25,433,630 0.9465 26,871,241 5 24 .062099851
G1 23,335,240 1.0112 23,076,780 4 8 .001616216
G1 26,176,040 1.0828 24,174,400 3 5 .002305977
L1 14,472,590 0.9527 15,191,130 8 275 .018130459
L1 14,300,810 1.0275 13,918,063 6 74 .001927993
L1 14,765,080 1.0627 13,893,931 6 26 .003201358
L1 13,322,750 1.0072 13,227,512 3 3 .013872959
Random Totals: 713,694,112   720,542,911 146 5,420  
Catg J Exception Values: 35,980,572   36,510,001      
Catg D1 Exception Values: 12,832,574   14,387,280      
Catg G1 Exception Values: 19,733,270   19,206,759      
Total Test Values (4): 782,240,528   790,646,951      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 39,532,348

Confidence Interval Values (5)

State Lower Limit: 751,114,603 (State Test Value minus Margin of Error Percent)
Local Test Value: 782,240,528 (Within Confidence Interval)
State Upper Limit: 830,179,299 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,027,082,567 (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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