Justin is interested in buying a digital phone. He visited 10 stores at random and...
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Justin is interested in buying a digital phone. He visited 10 stores at random and recorded the price of the particular phone he wants. The sample of prices had a mean of 332.88 and a standard deviation of 10.23. (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
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