Mathematics, 09.04.2020 16:22 lola78830
Justin is interested in buying a digital phone. He visited 16 stores at random and recorded the price of the particular phone he wants. The sample of prices had a mean of 262.49 and a standard deviation of 27.57.
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 ()
Answers: 3
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The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22
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