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2012 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 112,665,979 0.9747 115,590,417 18 1,934 .016280810
A 122,814,180 1.0355 118,603,747 16 1,187 .016821380
A 115,174,010 1.0025 114,886,793 17 847 .002709514
A 117,722,720 1.0037 117,288,752 14 534 .010887754
F1 35,846,124 1.0542 34,003,153 10 335 .005399368
F1 34,071,696 1.0415 32,714,062 9 118 .011478451
F1 38,441,245 1.0147 37,884,345 8 45 .005570867
F1 33,997,750 1.0231 33,230,134 5 10 .003233955
L1 14,446,120 1.0980 13,156,758 11 269 .014555503
L1 13,701,830 1.0817 12,666,941 9 66 .038673349
L1 14,603,270 1.0245 14,254,046 7 25 .012748921
L1 10,597,710 1.0065 10,529,270 2 2 .002259168
Random Totals: 664,082,634   654,808,418 126 5,372  
Catg J Exception Values: 13,960,440   14,907,243      
Catg D1 Exception Values: 12,771,108   15,551,590      
Total Test Values (4): 690,814,182   685,267,251      

Margin of Error

Margin of Error Percent: 5.0000001
Margin of Error Value: 34,263,363

Confidence Interval Values (5)

State Lower Limit: 651,003,888 (State Test Value minus Margin of Error Percent)
Local Test Value: 690,814,182 (Within Confidence Interval)
State Upper Limit: 719,530,614 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,040,471,014 (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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