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Ber [7]
2 years ago
9

The numbers of pages in the books in a library follow a normal distribution. If the mean number of pages is 180 and the standard

deviation is 30 pages, what can you conclude?
Mathematics
1 answer:
Naddika [18.5K]2 years ago
7 0

Answer:

Step-by-step explanation:

For the answer to the question above, the numbers of pages in the books in a library follow a normal distribution. If the mean number of pages is 180 and the standard deviation is 30 pages, you can conclude that about 16% of the books have fewer than 150 pages. I hope this helps

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A firm’s marketing manager believes that total sales for next year will follow the normal distribution, with a mean of $3.2 mill
klasskru [66]

Answer:

The sales level that has only a 3% chance of being exceeded next year is $3.67 million.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

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In this question, we have that:

In millions of dollars,

\mu = 3.2, \sigma = 0.25

Determine the sales level that has only a 3% chance of being exceeded next year.

This is the 100 - 3 = 97th percentile, which is X when Z has a pvalue of 0.97. So X when Z = 1.88.

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The sales level that has only a 3% chance of being exceeded next year is $3.67 million.

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Step-by-step explanation:

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