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Mathematics, 06.05.2021 06:40 slbutler2005

The playing time X of classical CDs has the normal distribution with mean 54 and standard deviation 5; the N(54, 5) distribution. What is the relative frequency of classical CDs with playing time X
between 49 and 69 minutes?

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The playing time X of classical CDs has the normal distribution with mean 54 and standard deviation...
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