In a study conducted by the mechanical engineering department at a university, the steel rods

supplied by two different companies were compared. Ten sample springs were made out of the

steel rods supplied by each company, and a measure of flexibility was recorded for each. The

data are provided in the accompanying table.

$($b$)$ Compute both the mean and the variance in flexibility for both company A and company

$($c$)$ Does there appear to be a difference in flexibility between company A and company $B?$

Flexibility of Springs