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2011 Confidence Interval Detail
220/Tarrant
220-919/Carroll ISD

Category Summary

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

Stratum
Variance
A 1,014,792,506 0.9830 1,032,342,326 50 2,973 .003422387
A 972,697,963 0.9728 999,895,110 51 2,080 .003181837
A 1,073,630,559 0.9631 1,114,765,402 50 1,737 .006360387
A 1,004,468,758 0.9849 1,019,868,777 50 940 .008151512
F1 217,688,359 0.8968 242,739,027 9 173 .004590017
F1 211,427,626 0.9209 229,588,040 8 50 .023800134
F1 209,787,950 0.8624 243,260,610 6 16 .014393155
L1 59,440,155 1.1655 50,999,704 12 383 .070589074
L1 64,816,200 1.0822 59,892,996 10 69 .020609767
L1 124,012,558 1.0039 123,530,788 7 17 .001651498
Random Totals: 4,952,762,634   5,116,882,780 253 8,438  
Catg D1 Exception Values: 194,592   111,859      
Catg F1 Exception Values: 175,871,393   199,922,000      
Total Test Values (4): 5,128,828,619   5,316,916,639      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 265,845,832

Confidence Interval Values (5)

State Lower Limit: 5,051,070,807 (State Test Value minus Margin of Error Percent)
Local Test Value: 5,128,828,619 (Within Confidence Interval)
State Upper Limit: 5,582,762,471 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 5,329,242,312 (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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