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2011 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 942,715,662 1.0630 886,844,461 47 12,196 .034635271
A 950,741,570 1.0155 936,230,005 45 9,270 .029520205
A 918,713,958 1.0480 876,635,456 45 7,117 .034934526
A 948,811,942 0.9935 955,019,569 45 4,717 .025473926
B 159,886,159 0.9179 174,186,904 10 40 .024132889
B 135,239,812 1.0181 132,835,490 7 21 .003913083
B 178,139,427 1.0709 166,345,529 6 18 .016714500
B 149,980,768 0.9147 163,967,167 5 9 .030347863
F1 382,641,887 0.9316 410,736,246 12 585 .021097117
F1 400,243,818 0.9835 406,958,635 11 208 .006140385
F1 386,303,188 0.9804 394,026,100 12 90 .012217468
F1 376,122,078 0.9245 406,838,375 8 33 .008239332
L1 115,402,564 0.9035 127,728,350 10 1,174 .017500553
L1 124,259,831 0.9401 132,177,248 10 182 .007031803
L1 135,324,603 0.9871 137,093,104 8 59 .005422330
L1 130,471,239 0.9794 133,215,478 5 12 .000782722
Random Totals: 6,434,998,506   6,440,838,117 286 35,731  
Catg D1 Exception Values: 11,863,371   11,867,970      
Total Test Values (4): 6,446,861,877   6,452,706,087      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 322,635,304

Confidence Interval Values (5)

State Lower Limit: 6,130,070,783 (State Test Value minus Margin of Error Percent)
Local Test Value: 6,446,861,877 (Within Confidence Interval)
State Upper Limit: 6,775,341,391 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 7,130,865,329 (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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