Question

Using the grouped frequency distribution, what is the arithmetic mean miles per gallon?

Answer 1

Arithmetic mean is 18.6 mpg

Explanation:

As complete statement is not given so considering most relevant question attached below

From given frequency distribution:

mpg No. of trucks (fₓ) X (mid point) X.fₓ

10-13 2 11.5 23

13-16 5 14.5 72.5

16-19 10 17.5 175

19-22 8 20.5 164

22-25 3 23.5 70.5

25-28 2 26.5 53

∑(fₓ) = 30

∑X.fₓ = 558

Arithmetic mean
`=(\sum X.f_(x) )/(\sum f_(x))\\\\=(558)/(30)\\=18.6 mpg`