Q) Following is the daily expenditure on lunch by 30 employees of a company:

Following is the daily expenditure on lunch by 30 employees of a company: Find the mean daily expenditure of the employees.

Find the mean daily expenditure of the employees.

Ans:  Let’s re-arrange the data with midpoint of each class, frequency, and multiply midpoint with frequency:

Following is the daily expenditure on lunch by 30 employees of a company: Find the mean daily expenditure of the employees.

We know that, mean of grouped data is given by:

Mean of grouped data = 150 + (\frac{\sum f_d}{\sum f})

Therefore, Mean expenditure = 150 + \frac{-60}{30} = 148

Hence, the mean expenditure of the given data is 148.

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