Question

4. Find the mean of the following frequency distribution by using step deviation
method:
Class intervall 0-10 10-20 20-30 30-40 40-50
Frequency 14 24 26 20 16​

Answer 1

Answer:

Find the mean using step deviation method class interval:0-10,10-20,20-30, 30-40,40-50 frequency :7,12,13,10,8 - 7461581. ... - 14,-12,0,10,16. Therefore, mean = 25+(0/50)*10. = 25+0. =25.