Question

how to calculate mean or median

Answer 1

for mean :-add together all values and divide by the number of addends.
eg**1+2+3+4/4=10/4=2.5

for median :-the mid term of the data set in order of least and greatest

Answer 2

mean- sum of all observations/no. of observations
median- first arrange in ascending order
then count the no. of observations(n).
if n=even
then solution=1\2[n/2 term + (n/2+1 term)]
if n=odd
then solution=n+1/2 term