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2009 Confidence Interval Detail
101/Harris
101-919/Spring ISD

Category Summary

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

Stratum
Variance
A 992,227,798 1.0603 935,799,112 78 10,502 .028471377
A 1,027,518,092 1.0259 1,001,577,241 70 8,654 .021395544
A 861,284,230 1.0078 854,618,208 75 5,978 .018341082
A 827,351,421 1.0603 780,299,369 75 3,637 .051024630
B 207,772,243 0.9789 212,250,733 6 44 .002074471
B 166,025,483 0.9347 177,624,353 5 22 .003242013
B 203,390,687 0.9740 208,820,007 5 18 .000868368
B 122,208,175 0.9404 129,953,397 4 7 .005607465
F1 437,180,663 0.8663 504,652,733 8 567 .012114533
F1 406,214,393 0.9526 426,427,034 7 170 .018337259
F1 408,778,179 0.9769 418,444,241 6 80 .002169004
F1 345,803,698 1.0401 332,471,587 6 27 .008341652
L1 131,134,343 1.0155 129,132,785 11 1,275 .005513978
L1 145,771,074 0.9475 153,848,099 10 187 .007679740
L1 119,169,775 1.0074 118,294,396 6 42 .007162289
L1 133,473,394 1.0020 133,206,980 4 9 .002396376
Random Totals: 6,535,303,648   6,517,420,275 376 31,219  
Catg D1 Exception Values: 11,696,820   11,655,552      
Total Test Values (4): 6,547,000,468   6,529,075,827      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 326,453,791

Confidence Interval Values (5)

State Lower Limit: 6,202,622,036 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,547,000,468 (Within Confidence Interval)
State Upper Limit: 6,855,529,618 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 8,332,879,764 (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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