Question

calculate
the
value
of
mean
and median
from
the
following
data
value 60 65 62 63 66 61 64
frequency 25 125 400 375 101 140 220​

Answer 1

Mean= sum of all observations/ total no.of observations

=60+65+62+63+66+61+64/7

=441/7

=63 is the mean

here ,for median n= 7 which is odd no.

so, (n+1)/2th observation

=(7+1)/2th observation

=8/2 =4th observation

so, here 4th observation is 63

so,median is 63