# Question

Travelers pay taxes for ﬂying, car rentals, and hotels. The following data represent the total travel tax for a 3-day business trip in eight randomly selected cities.

(a) Determine a point estimate for the population mean travel tax.

(b) Use the normal probability plot and boxplot shown next to assist in verifying the requirements for constructing a conﬁdence interval for the mean travel tax.

(c) Construct and interpret a 95% conﬁdence interval to estimate the mean tax paid for a 3-day business trip.

(d) What would you recommend to a researcher who wants to increase the precision of the interval, but does not have access to additional data?

(a) Determine a point estimate for the population mean travel tax.

(b) Use the normal probability plot and boxplot shown next to assist in verifying the requirements for constructing a conﬁdence interval for the mean travel tax.

(c) Construct and interpret a 95% conﬁdence interval to estimate the mean tax paid for a 3-day business trip.

(d) What would you recommend to a researcher who wants to increase the precision of the interval, but does not have access to additional data?

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