We are asked to find the mean of a set of data. Let's remember that the mean is the sum of all the terms in a set of data divided by the number of terms. The given set of data is:
[tex]1,2,2,2,3,4,4,5,6,7,7,8,9,9,10[/tex]We sum all the terms and divide them by 15, like this:
[tex]M=\frac{1+2+2+2+3+4+4+5+6+7+7+8+9+9+10}{15}[/tex]Solving the sum:
[tex]M=\frac{79}{15}[/tex]The mean is then:
[tex]M=5.3[/tex]