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2007 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 1,105,127,936 1.0005 1,104,575,648 69 10,865 .004917205
A 1,100,854,617 0.9989 1,102,066,891 69 8,668 .003466306
A 1,102,849,276 0.9875 1,116,809,393 70 7,088 .002381333
A 1,102,618,100 0.9936 1,109,720,310 90 4,796 .008700107
B 168,620,925 0.8099 208,199,685 7 35 .100424751
B 175,609,469 0.9281 189,213,952 5 24 .017218140
B 169,595,736 1.0151 167,072,935 5 16 .001034609
B 160,132,675 0.9330 171,632,020 6 10 .002248437
F1 360,532,049 0.9043 398,686,331 11 495 .047337673
F1 362,224,771 0.7792 464,867,519 11 160 .252088433
F1 366,289,372 0.9336 392,340,801 8 72 .006251791
F1 346,314,908 0.8603 402,551,329 8 29 .046776192
L1 131,401,694 1.0077 130,397,632 9 1,447 .023114387
L1 132,551,894 0.9461 140,103,471 7 195 .002193864
L1 135,394,200 0.9113 148,572,589 6 58 .022183719
L1 130,851,809 0.9680 135,177,489 6 15 .001828512
Random Totals: 7,050,969,431   7,381,987,995 387 33,973  
Catg D1 Exception Values: 9,445,904   9,426,532      
Total Test Values (4): 7,060,415,335   7,391,414,527      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 369,570,726

Confidence Interval Values (5)

State Lower Limit: 7,021,843,801 (State Test Value minus Margin of Error Percent)
Local Test Value: 7,060,415,335 (Within Confidence Interval)
State Upper Limit: 7,760,985,253 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,685,407,632 (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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