S10b
Averages from Tables
Estimate for the Mean
1)
50 hippos were captured over the course of a year and weighed.
The results can be seen in the table, below.
Weight of hippo
in tonnes
Frequency
1.4 < W< 1.7
5
Work out an estimate for the mean weight of a hippo.
Give your answer to 1 decimal place.
1.7 <w< 2.0
2.0 W< 2.3
2.3 < W< 2.6
12
2.6 sw< 2.9
2.9 <W <3.2