Find the mean absolute deviation from the following
list: 15, 13,9,3
Mean: 10
Absolute deviations: 5,3, 1,7

3.9

Step-by-step explanation:

Mean: 15 + 13 + 9 + 3 + 10 + 5 + 3 + 1 + 7 = 66/9 = 7.3

7.3 - 15 = 7.7

7.3 - 13 = 5.7

7.3 - 9 = 1.7

7.3 - 3 = 4.3

7.3 - 10 = 2.7

7.3 - 5 = 2.3

7.3 - 3 = 4.3

7.3 - 1 = 6.3

7.3 - 7 = 0.3

7.7 + 5.7 + 1.7 + 4.3 + 2.7 + 2.3 + 4.3 + 6.3 + 0.3 = 35.3/9 = 3.9

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-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

step-by-step explanation:

you divide the denominator by the numerator on both sides and if the quotients are equal then the fractions are equivalent