Question

A researcher observes the level of aggression of six 5-year-old boys over the course of a school day. The number of incidents for the group of boys was 2, 4, 6, 12, 8, 10. What is the mean number of aggressive acts for this group of children?

a) 9
b) 5
c) 7
d) 4

Answer 1

`Mean = 7`

Explanation:

Given

`Data: 2, 4, 6, 12, 8, 10.`

Required

Determine the mean

The mean of a data is calculated as thus:

`Mean = (\sum x)/(n)`

In this case:

`n = 6`

So, the formula becomes:

`Mean = (2+4+6+12+8+10)/(6)`

`Mean = (42)/(6)`

`Mean = 7`