Question

calculate the standard deviation of the following data, using step deviation method.
age 20-30,30-40,40-50,50-60,60-70,70-80,80-90 and frequency 3,61,132,153,140,51,2​

Answer 1

Answer:

Hope it will help you alot

Answer 2

20-30,30-40,40-50,50-60,60-70,70-80,80-90 and frequency 3,61,132,153,140,51,2 mark me as a brainlist