Songs on an iPod: Suppose an iPod has 3,000 songs. The histogram below shows the distribution of the lengths of these songs. We also know that, for this iPod, the mean length is 3.45 minutes and the standard deviation is 1.63 minut
Songs on an iPod: Suppose an iPod has 3,000 songs. The histogram below shows the distribution of the lengths of these songs. We also know that, for this iPod, the mean length is 3.45 minutes and the standard deviation is 1.63 minut
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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4.41 Songs on an iPod: Suppose an iPod has 3,000 songs. The histogram below shows the distribution of the lengths of these songs. We also know that, for this iPod, the mean length is 3.45 minutes and the standard deviation is 1.63 minutes.
(a) Calculate the
(please round to four decimal places)
(b) You are about to go for an hour run and you make a random playlist of 15 songs. What is the probability that your playlist lasts for the entire duration of your run? Hint: If you want the playlist to last 60 minutes, what should be the minimum average length of a song? (You may assume that the conditions for using the CLT are met)
The minimum average length of a song if the playlist is to last the full 60 minutes can be:_______________ minutes
The probability requested is:____________ (please round to four decimal places)
(c) You are about to take a trip to visit your parents and the drive is 6 hours. You make a random playlist of 100 songs. What is the probability that your playlist lasts the entire drive?________________ (please round to four decimal places)

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4.41 Songs on an iPod: Suppose an iPod has 3,000 songs. The histogram below shows the distribution of
the lengths of these songs. We also know that, for this iPod, the mean length is 3.45 minutes and the
standard deviation is 1.63 minutes.
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(a) Calculate the probability that a randomly selected song lasts more than 5 minutes (notice that the
distribution is skewed).
(please round to four decimal places)
Help
TaxReturn
(b) You are about to go for an hour run and you make a random playlist of 15 songs. What is the probability
that your playlist lasts for the entire duration of your run? Hint: If you want the playlist to last 60 minutes,
what should be the minimum average length of a song? (You may assume that the conditions for using the
CLT are met)
The minimum average length of a song if the playlist is to last the full 60 minutes can be:
minutes
The probability requested is:
| (please round to four decimal places)
13
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