Question

If the mean of the data below is 3.8 find m.
x 1 2 3 4 5 6
y 2 4 7 m 6 3​

Answer 1

m = 0.8

Explanation:

The mean can be calculated as:

`(2 + 4 + 7 + m + 6 + 3)/(6) = 3.8`

Then, all the values can be added and the expression turns into:

`(22 + m )/(6) = 3.8`

The expression can be simplified by multiplying on both sides by 6:

`(22 + m )/(6)*6 = 3.8*6`

`22 + m = 22.8`

Which makes m = 0.8