Question

Pls help! Mr Douglass trains a group of student athletes. He wants to know how they are improvising in the number of sit ups they can do. The following dot plots show the number of sit ups each student was able to do last month and this month.

By how much did the mean number of sit ups increase from last month to this month?
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Answer 1

Last month mean: 31
This month mean: 38.5
38.5-31=7.5
The mean number of sit ups increased from last month to this month is 7.5