Question

the mean of the following data is

Answer 1

xifi / N = mean

 

755/50 = 15.1

mean is 15.1

Answer 2

Answer:

Step-by-step explanation:

C.I will be 0-5....20-25

By step deviation method

xi will be 2.5 7.5..... and so on

Therefore a + fiui / fi x h

=12.5 + 1/50 x 5

=12.6

Hope u find this helpful