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3 years ago

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There are 40 children in the park which is 500 square yards, and there are 30 children in the baseball field which is 300 square

yards. Which is more crowded ? ( find the rate per 100 sq yds and compare-SHOW ALL WORK)

1 answer:

Karolina [17]3 years ago

5 0

Answer:

30 in 300 is more

Step-by-step explanation:

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how many weeks of data must be randomly sampled to estimate the mean weekly sales of a new line of athletic footwear? We want 98

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Answer:

We need to sample at least 37 weeks of data.

Step-by-step explanation:

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Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

We want 98% confidence that the sample mean is within $500 of the population mean, and the population standard deviation is known to be $1300

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So

$M = z*\frac{\sigma}{\sqrt{n}}$

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$500\sqrt{n} = 2.327*1300$

$\sqrt{n} = \frac{2.327*1300}{500}$

$(\sqrt{n})^{2} = (\frac{2.327*1300}{500})^{2}$

$n = 36.6$

Rounding up

We need to sample at least 37 weeks of data.

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Step-by-step explanation:

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