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MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A travel magazine conducts an annual survey where readers rate their favorite cruise ship. Ships are rated on a 10 point scale, with higher values indicating better service. A sample of 25 ships that carry fewer than 500 passengers resulted in a average rating of 6.22 with standard deviation 0.51. A sample of 20 ships that carry more than 500 passengers resulted in an average rating of 6.23 with standard deviation 0.98. Give a 99.8% confidence interval of the difference between the population mean ratings for smaller ships and the population mean ratings for larger ships. (Note, the order of subtraction matters...look at the wording carefully.) Rounded to 2 decimal places.
Transcribed Image Text:A travel magazine conducts an annual survey where readers rate their favorite cruise ship. Ships are rated on a 10 point scale, with higher values indicating better service. A sample of 25 ships that carry fewer than 500 passengers resulted in a average rating of 6.22 with standard deviation 0.51. A sample of 20 ships that carry more than 500 passengers resulted in an average rating of 6.23 with standard deviation 0.98. Give a 99.8% confidence interval of the difference between the population mean ratings for smaller ships and the population mean ratings for larger ships. (Note, the order of subtraction matters...look at the wording carefully.) Rounded to 2 decimal places.
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