mean of the sample 8,3,7,3,4 is given by:
[tex] \mu=\frac{ \Sigma x_i}{n} [/tex]
summation of x is:
[tex] \Sigma x_i=8+3+7+3+4=25
n=5
[/tex]
hence
[tex] \mu= \frac{25}{5}=5[/tex]
The variance will be
[tex] \sigma^2= \frac{\Sigma(x- \mu)^2}{n}
[/tex]
[tex]\Sigma(x_i- \mu)^2= 22[/tex]
[tex] \sigma^2= \frac{22}{5}=4.4
[/tex]
