[toula987]

QUESTION 1
:
A recent survey of __60___ guests at the Backpackers Paradise Hotel gave a sample average daily food

expenditure of x = $_43____ with a sample standard deviation, s = $___11__.


a. Calculate a 95% confidence interval for the unknown population mean, μ.


b. What sample size would be required to be 95% sure of estimating the unknown population mean to

within ±$5?

c. A census of guests 2 years ago gave a

population mean expenditure of $_35____. Test, at the 5% level

of significance, whether your data supports the hypothesis of a significant increase in the average daily food expenditure over the 2 year period. [Hint:This is a 1-sample test]

[ma0641]

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