Question

The numbers of workers of a new fast-food restaurant with 7 outlets are 8, 9, 8, 10, 12, 11, and 7. compute the following: Population mean: Population variance population standard deviation

Answer 1

$\mu=\frac{1}{7}\Sigma_{i=1}^7x_i=\frac{65}{7}=9.2857.$

$\sigma^2=\frac{1}{7}\Sigma_{i=1}^7(x_i-\mu)^2=\frac{19.4286}{7}=2.7755.$

$\sigma=\sqrt{2.7755}=1.6660$ .