7 help Solutionclass boundaries Mid X Frequency f fX 0535 2

#7 help

Solution

class boundaries

Mid X

Frequency f

f*X

0.5-3.5

2

12

24

3.5-6.5

5

3

15

6.5-9.5

8

2

16

9.5-12.5

11

11

121

12.5-15.5

14

10

140

Total

38

316

Mean =\\frac{ \\sum f*X}{ \\sum f}

=316/38 =8.315789474

Mean =8.3158 million dollars ( 4 decimal places)

Note: check the decimal places needed because the question was nor clearly visible.