español The price of a popular tennis racket in a national chain of stores is 179….

español

The price of a popular tennis racket in a national
chain of stores is 179. Pablo bought 5 of these rackets at
different internet sites at the following prices:
155

179
175
175
161
assuming that the racket prices are normally
distributed, determine if there is sufficient evidence in the
sample, at the level of significance of 5%, to conclude that the
average price of the racket is less than 179 when buying online