Table below shows the frequency f with which ‘x’ alpha particles were radiated from a diskette

Question

Table below shows the frequency f with which ‘x’ alpha particles were radiated from a diskette Calculate the mean and variance.

Philoid · Accepted Answer

Given, The data is given in table

To Find: Find the mean and variance

Explanation: Mean =

Mean =

Now, N=70

Hence, The mean is 3.88 and variance is 3.63