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Mathematics

2 answers:

tiny-mole [99]3 years ago

5 0

36inches dnsjwkwwkwkww

Cerrena [4.2K]3 years ago

3 0

B= 12 inches
Perimeter of the triangle= 36 inches

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You decide to buy some berries as a surprise for your aunt from the local farmer’s market. However, when you arrive, you see tha

Amanda [17]

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3 years ago

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m_a_m_a [10]

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3 years ago

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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:

$\overline{x}$ is the sample mean.

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:

$6\sigma = 800 - 200$