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erica [24]
3 years ago
9

Joel gave one fourth of his 236 postage stamps to his sister

Mathematics
1 answer:
Lorico [155]3 years ago
4 0

Since one fourth is the same as 1/4 or one quarter we can do 236 / 4 = 1 quarter:

236/4 = 59 so his sister gets 59 postage stamps. Then if we do 236 - 59 we get 177 thats how many Joel has left.

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Using the z-distribution, the 99​% confidence interval to estimate the population proportion is: (0.2364, 0.4836).

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

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

In which:

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  • z is the critical value.
  • n is the sample size.

In this problem, we have a 99% confidence level, hence\alpha = 0.99, z is the value of Z that has a p-value of \frac{1+0.99}{2} = 0.995, so the critical value is z = 2.575.

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Then the bounds of the interval are:

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The 99​% confidence interval to estimate the population proportion is: (0.2364, 0.4836).

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

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Step-by-step explanation:

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