Q. 44.2( 288 Votes )

# Thirty women were examined in a hospital by a doctor and the number of heart beats per minute were recorded and summarised as follows. Find the mean heart beats per minute for these women, choosing a suitable method

Answer :

The above given data can be represented in the form of table as below:

Let the assumed mean for the given data be, a = 75.5

Now, mean of the deviation can be calculated as follows:

where, f

_{i}= frequency of the ith class

d

_{i}= deviation from assumed mean of the ith class = x

_{i}- a

deviation

= 0.4

Mean can be calculated as follows:

=

= 0.4 + 75.5

= 75.9

Mean heartbeat for women = 75.9Rate this question :

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