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3 years ago

5

A book sold 37,900 copies in its first month of release. Suppose this represents 7.1% of the number of copies have been sold to

date? ROUND YOUR ANSWER TO THE NEAREST WHOLE NUMBER

1 answer:

stira [4]3 years ago

8 0

Hope you understand the working.
The answer rounded up is 2691

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3 years ago

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Let the number of trails available in the state park = t

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3 years ago

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Arte-miy333 [17]

Answer:

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Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

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For this problem, we have that:

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90% confidence level

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The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.1241 + 1.645\sqrt{\frac{0.1241*0.8759}{1160}} = 0.14$

The 90% confidence interval for the percentage of people the company contacts who may buy something is between 10.82% and 14%

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