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2011 Confidence Interval Detail
084/Galveston
084-910/Clear Creek ISD

Category Summary

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

Stratum
Variance
A 1,070,937,281 0.9562 1,119,992,973 27 8,350 .005927462
A 1,066,680,700 0.9539 1,118,231,156 35 6,005 .005269833
A 1,131,937,406 0.9781 1,157,281,879 39 4,831 .006996089
A 1,096,118,783 0.9721 1,127,578,215 22 2,639 .009013342
F1 124,964,090 0.9846 126,918,637 10 356 .027104223
F1 122,999,330 0.9412 130,683,521 10 115 .036168883
F1 139,268,850 1.0207 136,444,450 8 51 .023909424
F1 137,642,550 1.0300 133,633,544 6 17 .005150240
Random Totals: 4,890,548,990   5,050,764,375 157 22,364  
Catg D1 Exception Values: 344,165   509,688      
Total Test Values (4): 4,890,893,155   5,051,274,063      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 252,563,703

Confidence Interval Values (5)

State Lower Limit: 4,798,710,360 (State Test Value minus Margin of Error Percent)
Local Test Value: 4,890,893,155 (Within Confidence Interval)
State Upper Limit: 5,303,837,766 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 5,092,436,079 (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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