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Justin is interested in buying a digital phone. He visited 8 stores at random and recorded...

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 346.71 and a standard deviation of 11.8.

(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.)

_______to________

math   Statistics-And-Probability   
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Answer #1

given thot ー= 346.71 ее о At 95% ConEid ene veedo level-of-tis 티- 35% Fts,2.GPS n oF eSTUY E 2-685 .? It-20 | AtgSY. (onciden ( e interva! For 346-71-11-20 34 6.71 +11.20 535 5.5 1,357.91)

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