Calculate the mean of the following data

Q) Calculate the mean of the following data :

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

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

Mean of grouped data = $(\frac{\sum f_x}{\sum f})$

Therefore, Mean value = $\frac{296}{28}$ = 10.57

Hence, the mean value of the given data is 10.57.

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