in a health check up , the nuber of heart beats of 40 women were recorded in the following table:

-no.of heart beats per minute | 65-69 | 70-74 | 75-79 | 79-84 |
- no of women | 2 | 18 | 16 | 4 |

find the mean of the data.

Dear Student,
Please find below the solution to the asked query:
 

S.No.	Number of heart beats	Number of women (f)	Mid point (x)	f*x
1	65-69	2	67	134
2	70-74	18	72	1296
3	75-79	16	77	1232
4	79-83	4	82	328
Total		∑f=40		∑(fx)=2990

$$\begin{gathered} \mathrm{Mean}=\frac{{\displaystyle \sum _{}^{}}\left(\mathrm{fx}\right)}{{\displaystyle \sum _{}^{}}\mathrm{f}} \\ =\frac{2990}{40} \\ =74.75 \\ \mathrm{Hence} \mathrm{mean} \mathrm{of} \mathrm{given} \mathrm{data} \mathrm{is} 74.75 \mathrm{heart} \mathrm{beats} \mathrm{per} \mathrm{minute}. \end{gathered}$$

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