Originally Posted by

**Needsomelessons** hi i need some help please

I was given the following set data 12 14 23 34 38 43 45 46 56 56 58 64 64 66 66 68 73 74 81 84 88 91 93 96 99 105 120.

I was given a table with the following headings in each column and was asked to complete it but i dont know what to do for "Cumulative frequency" and "Class middle value" please help

__Class intervals__ __Frequency(f)__ __Cumulative frequency__ __Class middle value__

1-20

21-40

61-80

91-100

101-120

If anyone understands how to complete the table please help.

thanks