Question

In an examination, the marks 1,2,3,4,5,6,7,8 and their corresponding frequencies 2,4,5,6,10,1,2,3 were obtained.
a. calculate the mean
b. calculate the median
c. calculate the standard deviation
d. calculate the variance ​

Answer 1

Answer:

mean = 1+2+3+4+5+6+7+8/8

=4.5

median={ (n+1)÷2th}

= 5 th obs