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Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase
Edition 6ISBN: 978-1111827021Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase
Edition 6ISBN: 978-1111827021 Exercise 63
Guarantee: Package Delivery Express Courier Service has found that the delivery time for packages is normally distributed, with mean 14 hours and standard deviation 2 hours.
(a) For a package selected at random, what is the probability that it will be delivered in 18 hours or less
(b) Inverse Normal Distribution What should be the guaranteed delivery time on all packages in order to be 95% sure that the package will be delivered before this time Hint: Note that 5% of the packages will be delivered at a time beyond the guaranteed time period.
(a) For a package selected at random, what is the probability that it will be delivered in 18 hours or less
(b) Inverse Normal Distribution What should be the guaranteed delivery time on all packages in order to be 95% sure that the package will be delivered before this time Hint: Note that 5% of the packages will be delivered at a time beyond the guaranteed time period.
Explanation
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Let x be a random variable that represen...
Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase
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