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2010 Confidence Interval Detail
113/Houston
113-902/Grapeland ISD

Category Summary

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

Stratum
Variance
A 16,328,480 1.0400 15,700,462 10 401 .016264563
A 17,006,380 0.9737 17,465,729 10 236 .003433611
A 17,898,360 0.9551 18,739,776 9 166 .015031664
A 18,497,430 0.9880 18,722,095 9 84 .000972160
D3 73,635,390 0.9926 74,184,354 24 4,249 .077167203
G1 5,621,790 0.9667 5,815,444 5 10 .003024013
G1 5,948,320 1.0325 5,761,085 3 5 .004675339
G1 7,189,230 1.0094 7,122,281 2 3 .000743832
Random Totals: 162,125,380   163,511,226 72 5,154  
Catg J Exception Values: 7,316,130   6,816,562      
Catg D1 Exception Values: 14,451,840   16,103,601      
Catg G1 Exception Values: 10,678,700   10,131,731      
Total Test Values (4): 194,572,050   196,563,120      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 9,828,156

Confidence Interval Values (5)

State Lower Limit: 186,734,964 (State Test Value minus Margin of Error Percent)
Local Test Value: 194,572,050 (Within Confidence Interval)
State Upper Limit: 206,391,276 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 252,675,752 (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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