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2008 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 1,146,638,311 1.0127 1,132,258,626 31 12,014 .014910077
A 1,142,232,882 1.0047 1,136,889,501 32 9,591 .010422044
A 1,137,361,104 1.0083 1,127,998,715 36 7,832 .011429140
A 1,112,546,705 1.0071 1,104,703,311 31 5,029 .009816148
B 161,673,809 0.9098 177,702,582 6 34 .012666167
B 196,242,188 0.7799 251,624,808 6 27 .044824831
B 229,021,687 0.8804 260,133,674 6 15 .013031277
F1 367,511,359 0.8402 437,409,378 11 530 .063298557
F1 411,476,351 0.9485 433,817,977 10 186 .012411455
F1 373,226,604 0.8840 422,202,041 7 80 .072914370
F1 462,681,932 0.9101 508,385,817 8 39 .020692329
L1 133,965,969 1.0147 132,025,199 7 1,256 .002578138
L1 124,972,186 0.9800 127,522,639 8 149 .011768960
L1 127,037,343 0.9884 128,528,271 7 45 .006378698
L1 132,935,916 0.9981 133,188,975 4 9 .000560188
Random Totals: 7,259,524,346   7,514,391,514 210 36,836  
Catg D1 Exception Values: 13,311,663   13,323,874      
Catg B Exception Values: 30,024,620   31,602,475      
Total Test Values (4): 7,302,860,629   7,559,317,863      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 377,965,893

Confidence Interval Values (5)

State Lower Limit: 7,181,351,970 (State Test Value minus Margin of Error Percent)
Local Test Value: 7,302,860,629 (Within Confidence Interval)
State Upper Limit: 7,937,283,756 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 8,173,565,482 (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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