Do these data allow the executive to infer thatcruise ships are attracting younger customers?b. Estimate with99% confidence the difference inages between this year and 2 years ago.

The cruise ship business is rapidly increas-ing. Although cruises have long been associatedwith seniors, it now appears that younger people arechoosing a cruise as their vacations. To determinewhether this is true, an executive for a cruise linesampled passengers 2 years ago and this year anddetermined their ages.a. Do these data allow the executive to infer thatcruise ships are attracting younger customers?b. Estimate with99% confidence the difference inages between this year and 2 years ago.


 

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