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Justin is interested in buying a digital phone. He visited 9 stores at random and recorded...

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Question

Basic Math

Justin is interested in buying a digital phone. He visited 9stores at random and recorded the price of the particular phone hewants. The sample of prices had a mean of 337.63 and a standarddeviation of 30.04.

(a) What t-score should be used as the multiplier for a 95%confidence interval for the mean, ?, of the distribution?
t =

(b) Calculate a 95% confidence interval for the mean price ofthis model of digital phone:
(Enter the smaller value in the left answer box.)
___ to ___

Answer & Explanation Solved by verified expert
4.0 Ratings (778 Votes)
Solution Given that 33763s 3004An Degrees of    See Answer
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