Q4 of 25 Page 332

Thirty women were examined in a hospital by a doctor and their of heart beats per minute were recorded and summarized as shown. Find the mean heart beats per minute for these women, choosing a suitable method.

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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