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2009 Confidence Interval Detail
101/Harris
101-912/Houston ISD

Category Summary

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

Stratum
Variance
A 13,623,118,919 0.9970 13,664,111,253 70 127,688 .027126312
A 14,385,029,699 0.9837 14,623,390,972 74 61,586 .016430888
A 14,899,866,656 0.9711 15,343,287,670 75 31,779 .009195571
A 15,810,325,846 0.9329 16,947,503,319 75 12,152 .023564938
B 2,316,220,177 0.6903 3,355,381,975 7 4,258 .058909246
B 2,224,546,354 0.9613 2,314,102,105 8 327 .004593894
B 2,476,265,249 0.9342 2,650,679,993 8 126 .006294382
B 2,348,480,692 1.0156 2,312,407,141 6 58 .001756347
C 838,701,662 0.9094 922,258,260 15 18,107 .040794319
C 783,576,280 0.8698 900,869,487 21 3,395 .035971203
C 828,423,894 0.8986 921,905,068 12 954 .032890020
C 805,803,987 0.9387 858,425,468 8 139 .033397589
D3 387,770,020 0.9588 404,432,645 10 1,212 .016979593
F1 7,799,496,091 0.8776 8,887,301,836 46 9,406 .030349599
F1 7,587,979,656 0.8840 8,583,687,394 15 1,398 .027137069
F1 7,263,913,379 0.8685 8,363,745,975 16 259 .037820704
F1 6,646,002,977 0.9532 6,972,306,942 15 49 .011189816
L1 2,261,263,189 0.9471 2,387,565,399 8 13,243 .007909093
L1 2,220,057,267 0.9463 2,346,039,593 9 1,606 .011118341
L1 2,206,194,787 0.9524 2,316,458,197 8 405 .004691697
L1 2,306,842,470 0.9711 2,375,494,254 7 103 .003346670
Random Totals: 110,019,879,251   117,451,354,946 513 288,250  
Catg D1 Exception Values: 389,873   250,233      
Total Test Values (4): 110,020,269,124   117,451,605,179      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 5,872,580,259

Confidence Interval Values (5)

Local Test Value: 110,020,269,124 (Outside Confidence Interval)
State Lower Limit: 111,579,024,920 (State Test Value minus Margin of Error Percent)
State Upper Limit: 123,324,185,438 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 117,355,833,669 (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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