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2010 Confidence Interval Detail
091/Grayson
091-906/Sherman ISD

Category Summary

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

Stratum
Variance
A 243,654,256 0.9798 248,677,542 61 4,373 .020353420
A 228,561,046 1.0020 228,104,836 58 2,421 .002112500
A 239,764,030 0.9953 240,896,242 60 1,752 .004037108
A 243,777,123 0.9841 247,715,804 31 955 .003040612
B 31,015,206 1.1249 27,571,523 12 262 .038402611
B 25,864,032 1.0335 25,025,672 10 33 .012585800
B 38,753,021 0.9961 38,904,750 5 9 .029697963
F1 124,146,497 0.9880 125,654,349 16 449 .131979953
F1 127,564,861 0.8666 147,201,547 11 104 .032236748
F1 125,534,874 0.8870 141,527,479 10 38 .041930792
F1 167,512,399 0.9338 179,387,876 6 14 .012633057
L1 60,166,766 1.0566 56,943,750 10 612 .005997702
L1 55,794,378 0.9852 56,632,540 9 86 .006321534
L1 61,458,821 1.2025 51,109,207 7 25 .041734089
L1 47,640,816 1.0296 46,271,189 4 6 .003353986
Random Totals: 1,821,208,126   1,861,624,306 310 11,139  
Catg J Exception Values: 52,931,335   50,329,435      
Catg D1 Exception Values: 3,170,261   2,329,868      
Catg B Exception Values: 25,628,038   25,625,000      
Total Test Values (4): 1,902,937,760   1,939,908,609      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 96,995,430

Confidence Interval Values (5)

State Lower Limit: 1,842,913,179 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,902,937,760 (Within Confidence Interval)
State Upper Limit: 2,036,904,039 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 2,319,828,089 (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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