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3 years ago

6

on the beach boardwalk there are 20 different places to get food. twenty percenct of them are ice cream shops. how many ice crea

m shops are in the park?

1 answer:

Rom4ik [11]3 years ago

8 0

Answer:

4 of the shops are ice cream shops.

Step-by-step explanation:

If you take 20 and multiply it by .20 (because when multiplying by a percent we move the decimal over twice) you will get that 4 of the shops are ice cream shops.

$(.20) * (20) = 4$

<em>Hope this helps!!</em>

<em>- Kay :)</em>

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Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Part a

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Where $\mu=72000$ and $\sigma=12000$

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If we apply this formula to our probability we got this:

$P(X>65000)=P(\frac{X-\mu}{\sigma}>\frac{65000-\mu}{\sigma})=P(Z>\frac{65000-72000}{12000})=P(z>-0.583)$

And we can find this probability using the complement rule and excel or the normal standard table and we got:

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And the best way to solve this problem is using the normal standard distribution and the z score given by:

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