Answer :
We shall use assumed mean method to find mean heart beats per minute, as this data has large values of xi’s and has a risk of miscalculation. But by using assumed mean method, we’ll be able to solve it with ease and more accuracy.
Mean is given by
⇒ 
⇒ 
⇒ 
⇒ Mean = 75.9
Thus, mean heart beats per minute of these women is 75.9.
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