Find the mean and variance of the frequency distribution given below

Find the mean and variance for the frequency distribution.

Find the mean variance of the frequency distribution given below :

Find the mean and variance of frequency distribution given below: x_i : 1lt=x<3 3lt=x<5 5lt=x<7 7lt=x<10 f_i : 6 4 5 1

Find the mean and variance of frequency distribution given below: x_i : , 1lt=x<3 , 3lt=x<5 , 5lt=x<7 , 7lt=x<10 f_i : , 6, 4, 5, 1

Find the mean and variance for the following frequency distributions in