A representative from a local insurance agency selected a ra

A representative from a local insurance agency selected a random sample of insured drivers and recorded the number of claims each made in the last 2 years.

Number of claims

Frequency

1

14

2

18

3

12

4

5

How many claims did the drivers made on average in the last two years?

2.16

4.5

1.84

7

Solution

Note that

Mean = Sum (fi xi) / Sum(fi)

= [1*14 + 2*18 + 3*12 + 4*5] / [14 + 18+12+5]

= 2.163265306

= 2.16 [answer, option a]