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irga5000 [103]
3 years ago
12

I don't understand how to solve this. Can someone help me?

Mathematics
2 answers:
Marat540 [252]3 years ago
7 0

Answer: 62-48=14

Step-by-step explanation: therefor the bottom right hand corner is 14.

hope this is right ;)

boyakko [2]3 years ago
6 0

Answer:

132 °

Step-by-step explanation:

Angles in a straight line add up to 180°

180-48

132

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Scores on the math portion of the SAT are believed to be normally distributed and range from 200 to 800. A researcher from the a
Doss [256]

Using the z-distribution, it is found that she should take a sample of 46 students.

<h3>What is a z-distribution confidence interval?</h3>

The confidence interval is:

\overline{x} \pm z\frac{\sigma}{\sqrt{n}}

The margin of error is:

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

In which:

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  • z is the critical value.
  • n is the sample size.
  • \sigma is the standard deviation for the population.

In this problem, we have a 95% confidence level, hence\alpha = 0.95, z is the value of Z that has a p-value of \frac{1+0.95}{2} = 0.975, so the critical value is z = 1.96.

Scores on the math portion of the SAT are believed to be normally distributed and range from 200 to 800, hence, by the Empirical Rule the standard deviation is found as follows:

6\sigma = 800 - 200

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The sample size is n when M = 29, hence:

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

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29\sqrt{n} = 196

\sqrt{n} = \frac{196}{29}

(\sqrt{n})^2 = \left(\frac{196}{29}\right)^2

n = 45.67.

Rounding up, a sample of 46 students should be taken.

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

#SPJ1

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barxatty [35]
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