The accompanying data represent the total travel tax? (indollars) for a? 3-day business trip in 8 randomly selected cities.A normal probability plot suggests the data could come from apopulation that is normally distributed. A boxplot indicates thereare no outliers. Complete parts? (a) through? (c) below. 67.6278.42 70.61 84.97 80.32 85.33 100.83 99.72
?(a) Determine a point estimate for thepopulation mean travel tax.
?(b) Construct and interpret a
9595?%
confidence interval for the mean tax paid for a? three-daybusiness trip.
(c) What would you recommend to a researcherwho wants to increase the precision of the? interval, but does nothave access to additional? data?
