Price Wars Many seniors are ordering their drugs online to take advantage of lower c...

Price Wars Many seniors are ordering their drugs online to take advantage of lower costs for these pharmacies. A random sample of nine online pharmacies was selected and the cost of a 10- mg Buspar (Buspirone) tablet recorded, as given in the following table.

a. Test the hypothesis of no difference in costs between brand and generic Buspar 10-mg tablets at the α = .05 level of significance. (HINT: the observations are paired by the online pharmacies.)

b. Find the estimated savings per tablet by purchasing the generic as opposed to the brand-name tablets with a 95% confidence interval.