how do you find the mean of set of numbers?

Answer 1

If the numbers are x_1, x_2......x_n, then their mean is x = (Sum(i=1, n)(x_i))/n

Answer 2

1) Example: set of numbers :

A = { 2, 3, 7, 9 }

The mean of A is : (2 + 3 + 7 + 9 )/ 4 = 21/4 = 5.2


2) More generaly we have:

Imagine a set B of n numbers definite by:

B = { x1,x2,x3,x4,...xn}

The mean X of set B is :

X = (x1 + x2 + x3 + x4 + ... + xn)/n

with n >=2

Other example:

C = {1,2,3,4,5,6,7,8,9,10}

Find the mean X of set C ?

Solution: X = (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10)/10

= 55/10

= 5.5

Answer 3

add up all the numbers and divide the total by the number of numbers

Answer 4

Add them up and divide by the number of elements.

Answer 5

Add them up and divide them by the cardinality.