Question

Sheryl got these scores on her spelling tests.

95, 89, 99, 85, 82

What is the mean absolute deviation of her spelling test scores?

(10 point)




HELP PLSSSSSSSSS
5.6

17.0

89

90

Answer 1

5.6

Explanation:

Answer 2

5.6

Explanation:

Sheryl got the following scores on her spelling tests.

95, 89, 99, 85, 82

Mean = sum of all observations/ Number of observations

Sum of all observations
`=95+89+99+85+82=450`

Number of observations = 5

So,

Mean
`=(450)/(5)=90`

Let M denotes the mean

Mean absolute deviation
`=(\sum_(i=1)^(n)\left | x_i-M \right |)/(n)`

Put
`n=5`

So,

Mean absolute deviation
`=(\sum_(i=1)^(5)\left | x_i-M \right |)/(5)=(|95-90|+|89-90|+|99-90|+|85-90|+|82-90|)/(5)=(5+1+9+5+8)/(5) =(28)/(5)=5.6`