Justin is interested in buying a digital phone. He visited 20 stores at random and recorded the price of the particular phone he wants. The sample of prices had a mean of 359.78 and a standard deviation of 9.19. (a) What t-score should be used for a 95% confidence interval for the mean, μ, of the distribution? t⋆= (b) Calculate a 95\% confidence interval for the mean price of this model of digital phone: (Enter the smaller value in the left answer box.)