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# Using assumed mean method find the mean weight of 40 students Using the data given below.

Answer :

In assumed-mean method, we need to assume a mean value (the near to middle or middlemost value) from x_{i}’s.

We have the following table.

In assumed mean method, arithmetic mean is given by

Where, A = assumed mean = 53

∑f_{i}d_{i} = -17

& ∑f_{i} = 40

Putting all these value in the formula, we get

⇒

⇒

Thus, mean weight of 40 students is 52.575 kg.

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