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2009 Confidence Interval Detail
165/Midland
165-901/Midland ISD

Category Summary

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

Stratum
Variance
A 1,110,862,550 0.9457 1,174,645,818 65 11,760 .025472584
A 1,197,251,110 0.9799 1,221,809,481 75 7,516 .009037855
A 1,263,112,720 0.9761 1,294,040,283 70 5,526 .005676310
A 1,226,437,340 0.9921 1,236,203,346 70 3,027 .009458284
B 76,958,620 1.0162 75,731,765 20 224 .014943344
B 79,827,580 1.0164 78,539,532 8 18 .006045241
B 79,014,960 1.0854 72,798,010 4 9 .005585634
B 78,617,260 1.0184 77,196,838 3 5 .000465884
F1 298,757,550 0.8297 360,079,004 38 1,611 .125087351
F1 302,869,830 0.9434 321,040,736 12 356 .051894385
F1 318,694,900 1.0089 315,883,537 10 121 .007626718
F1 341,704,090 0.9674 353,219,030 7 37 .000214573
G1 485,847,463 1.1249 431,902,803 9 514 .069748222
G1 486,597,501 0.9943 489,387,007 7 133 .002980749
G1 482,075,037 1.0231 471,190,536 9 41 .004317646
G1 482,982,887 1.0299 468,960,954 4 6 .000511778
L1 177,849,830 1.0743 165,549,502 8 1,897 .018722069
L1 175,759,020 1.0520 167,071,312 7 302 .006516120
L1 187,960,170 1.0726 175,237,899 6 96 .015985642
Random Totals: 8,853,180,418   8,950,487,393 432 33,199  
Catg D1 Exception Values: 10,280,550   19,325,669      
Catg D3 Exception Values: 57,520   75,000      
Catg L1 Exception Values: 185,235,850   28,639,444      
Total Test Values (4): 9,048,754,338   8,998,527,506      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 449,926,375

Confidence Interval Values (5)

State Lower Limit: 8,548,601,131 (State Test Value minus Margin of Error Percent)
Local Test Value: 9,048,754,338 (Within Confidence Interval)
State Upper Limit: 9,448,453,881 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 10,227,067,256 (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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