Justin is interested in buying a digital phone. He visited 8 stores at random and recorded the price of the particular phone he wants. The sample of prices had a mean of 269.06 and a standard deviation of 34.15. (a) What t-score should be used for a 95% confidence interval for the mean, , 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.) to