Question

what does it mean to estimate the mean weight of the lightest 40 males

Answer 1

The average. Which is the all of the data added up divided by however much data there is. For example, 22 56 73 46 and 90. You add up those numbers which is 287, then you divide that by 5 since there are 5 numbers which is 57.4. So the average (AKA Mean) is 57.4.

Answer 2

Mean weight means average weight of the lightest males so take the wait of the lightest male then divide it by the number of males