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
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11
Answer:
Ci:
0-10, 10-20,20-30,30-40,40-50
Fi:
7,12,13,10,8
Xi:
5,15,25,35,45
Di:
-20,-10,0,10,20
Ui:
-2,-1,0,1,2
Fiui:
-14,-12,0,10,16
Therefore, mean = 25+(0/50)*10
= 25+0
=25
Answered by
14
hope you understand answer
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