Stat HW1

[Question 1] Travelers pay taxes for flying, car rentals, and hotels.  The following data represent the total travel tax for a 3-day business trip in either randomly selected cities.  

67.8178.6968.9984.3680.2486.14101.2799.29

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

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

[Question 2] Severe acute respiratory syndrome (SARS) is a viral respiratory illness.  It has the distinction of being the first new communicable disease of the 21st century.  Based on interviews with 81 SARS patients, researchers found that the mean incubation period was 4.6 days, with a standard deviation of 15.9 days.  Based on this information, construct a 95% confidence interval for the mean incubation period of the SARS virus.  Interpret the interval.