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Table Five
Table Five Sample Calculation of Median Appraisal Ratio XYZ County Appraisal District Category A: Single-family Residential
Sales and Appraisals
Number
Sale or
Appraisal
Appraisal
Roll Value
Sale Price
or
Appraisal Value
Individual
Appraisal
Ratio
S 17 \$ 84,449 \$ 84,995 0.99
S 15 114,788 118,898 0.97
S 6 89,654 94,715 0.95
S 12 39,479 41,925 0.94
A ;5 69,708 76,117 O.92
S 4 99,880 113,310 0.88
A 1 97,576 110,741 0.88
S 8 111,020 128,048 0.87
S 10 64,519 75,905 0.85
A 2 60,437 70,964 0.85
S 2 75,254 90,720 0.83
S 7 76,502 91,680 0.83
S 16 92,088 113,645 0.81
S 18 21,090 25,988 0.81
S 19 22,080 27,398 0.81
S 11 64,842 81,127 0.80
S 1 65,834 83,113 0.79
S 13 193,344 245,700 0.79
S 14 98,885 127,493 0.78
A 6 76,935 98,327 0.78
S 5 82,253 109,250 0.75
A 3 107,543 148,828 0.72
S 9 44,441 62,370 0.71
S 3 94,420 135,610 0.70
A 4 60,264 86,303 0.70
Total Tests = 25
.81 - Median Appraisal Ratio for Category A, XYZ Appraisal District

Table Six
Table Five Sample Calculation for Coefficient of Dispersion XYZ County Appraisal Districtt Category A: Single-family Residential
Sales and Appraisals
Sale or
Appraisal
Number
Individual
Property
Difference
from
or
Median (81%)
Absolute
Value of
Difference
S 17 99     + 18 18
S 15 97     + 16 16
S 6 95     + 14 14
S 12 94     + 13 13
A 5 92     + 11 11
S 4 88     + 7 7
A 1 88     + 7 7
S 8 87     + 6 6
S 10 85     + 4 4
A 2 85     + 4 4
S 2 83     + 2 2
S 7 83     + 2 2
S 16 81 10% 25% 0 0
S 18 81     0 0
S 19 81     0 0
S 11 80     - 1 1
S 1 79     - 2 2
S 13 79     - 2 2
S 14 78     - 3 3
A 6 78     - 3 3
S 5 75     - 6 6
A 3 72     - 9 9
S 9 71     - 10 10
S3 70     - 11 11
A4 70     - 11 11
Total of Absolute Values = 162
162- Total of Absolute Values
÷ 25- Number of Sample Properties
= 6.48- Average Absolute Deviation
÷ 81- Median Appraisal Ratio
-.08
x 100
8.0- Coefficient of Dispersion