Question

Find the mean and the MAD. [Note: Type your answers as decimal numbers, rounded to the nearest tenth.]

135, 160, 145, 155, 170, 150, 142

Mean :

MAD(Mean Absolute Deviation):

Answer 1

it seems the other guy is correct (:

Explanation:

Answer 2

Part 1) The mean is 151

Part 2) The mean absolute deviation (MAD) is 9.1

Explanation:

we have

set of data
`[135,160,145,155,170,150,142]`

step 1

Find the mean

Sum all the values and divide by the number of values

`[135+160+145+155+170+150+142]/7=1,057/7=151`

step 2

Determine the absolute value of subtract the mean from each value

`\left|135-151\right|=16`

`\left|160-151\right|=9`

`\left|145-151\right|=6`

`\left|155-151\right|=4`

`\left|170-151\right|=19`

`\left|150-151\right|=1`

`\left|142-151\right|=9`

step 3

Find the mean of those distances

`[16+9+6+4+19+1+9]/7=64/7=9.1` ----> this number is called the mean absolute deviation (MAD)