Justin is interested in buying a digital phone. He visited 9 stores at random and recorded the price of the particular p

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Justin Is Interested In Buying A Digital Phone He Visited 9 Stores At Random And Recorded The Price Of The Particular P 1 (41.64 KiB) Viewed 12 times

Justin is interested in buying a digital phone. He visited 9 stores at random and recorded the price of the particular phone he wants. The sample of prices had a mean of 395.98 and a standard devia- tion of 18.83. (a) What t-score should be used for a 95% confidence interval for the mean, u, 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