Q. Calculate Mean Deviation and Standard Deviation form the following data.
Marks No. of students
Below 20 8
Below 40 20
Below 60 50
Below 80 70
Below 100 80

only mean deviation

  • 3
 Marks is in  format of Inclusive series .We have to convert this into Exclusive series by using the formulae (d/2) where "d" is the difference
 
  • -1
What are you looking for?