Question

find mean median of all composite number between 90 to 100

Answer 1

The composite numbers between 90 and 100 are :
91, 92, 93, 94, 95, 96, 98 and 99.
sum of the observations = 91 + 92 + 93 + 94 + 95 + 96 + 98 + 99 = 758
number of observations = 8
so, mean = sum of observations number of observations = 758/8 
= 94.75

Since the above data is already arranged in ascending order and number of observations (n) is 8, that is even
,so median = value of (n/2)th observation +  value of (n/2 + 1)th observation/2           = value of (8/2)th observation + value of (8/2)th observation/ 2           = value of 4th observation + value of 5th observation2           = 94 + 952 = 1892so, median = 94.5
 
hope this was helpful...

Answer 2

Answer:

91,92,93,94,95,96,97,98 ,99