Q. 28 4.7( 3 Votes )

Weight of 60 eggs were recorded as given below:

Calculate their mean weight to the nearest gram.

Answer :

We will find the mean weight using step - deviation method, where A = Assumed mean and h = length of class interval.

Here, let A = 92 and h = 5

Since, the class intervals are inclusive type, we’ll first convert it into exclusive type by extending the class interval from both the ends.

We have got

A = 92, h = 5, Σfi = 60 & Σfiui = - 19

mean is given by

Thus, mean weight is 90 g.

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