(Answered) 1 the number of students who belong to the dance company at

Statistics

1) The number of students who belong to the dance company at each of several randomly selected small universities is shown here. Estimate the true population mean size of a university dance company with 95% confidence.

21 25 32 22 28 30 29 30 47 26

35 26 35 26 28 28 32 27 40 45

2) A pizza owner wishes to find the 95% confidence interval of the true mean cost of a large plain pizza. How large should the sample be if she wishes to be accurate to within $0.15? A previous study showed that the standard deviation of the price was $0.26.

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