Question

plz tell me how can we take Ci values and freqency of this table..

Answer 1

This is an inclusive series. To make it a normal series,
Just add 0.5 to the lower limit as well as upper limit of each Class Interval

so it becomes:
0.5 - 200.5 - 7
200.5 - 400.5 - 10
400.5 - 600.5 - 16
600.5 - 800.5 - 12
800.5 - 1000.5 - 3

Answer 2

frequency is the number of families and cumulative frequency is
by adding the frequency
7
7+10-17
7+10+16-31
7+10+16+12-43
7+10+16+12+3-46
hope it helps you