The following table shows the weights of children in a class.
Using this information:
a) Estimate the mean weight
b) Find the modal class
To estimate the mean weight, you know that children are between and . As you do not know exactly how much they weigh, assume that they all weigh (the midpoint of the group).
Find the mean for all the other groups:
a) Estimation of mean =
b) The modal class is the class that has the highest frequency. In this case the modal class is: