Question

find the mean of the following
Class Interval: 1-10,11-20,21-30,31-40,41-50,51-60
Frequency: 5,7,4,6,4,4.
NO INVALID ANSWERS!!!!!!
IF I WILL SUERLY REPORT THE ANSWER
​

Answer 1

Answer:

x

i

=5,15,25,35,45,55,65

∑f

i

=50

∑f

i

x

i

=30+75+200+525+315+330+195=1670

x

ˉ

=

∑x

i

∑f

i

x

i

=

50

1670

=33.4