A company makes muesli which contains nuts and sultanas. They counted the number of nuts in 50 individual serving packets.
They drew this table.
Number of nuts
Midpoint (x)
Number of
packets (0)
fx
4 - 6
5
3
15
7-9
8
9
10 - 12
11
12
13 - 15
14
17
16 - 18
17
9
50
a) Complete the table.
b) Calculate an estimate for the mean.