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3 years ago

Describe a trend line in a scatterplot and how it should look in comparison to the data points

Mathematics

2 answers:

posledela3 years ago

6 0

Answer:

A scatter plot shows a positive trend if y tends to increase as x increases. A scatter plot shows a negative trend if y tends to decrease as x increases. A scatter plot shows no trend if there is no obvious pattern.

Step-by-step explanation:

hope this helps you please mark me as brainliest

Musya8 [376]3 years ago

3 0

Answer: About 4 points should be below the trend line.

Step-by-step explanation:

This is the correct answer.

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How large a sample should be selected to provide a 95% confidence interval with a margin of error of 6? Assume that the populati

marshall27 [118]

Using the z-distribution, it is found that a sample of 171 should be selected.

<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.

For this problem, the parameters are:

$z = 1.96, \sigma = 40, M = 6$

Hence we solve for n to find the needed sample size.

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

$6 = 1.96\frac{40}{\sqrt{n}}$

$6\sqrt{n} = 40 \times 1.96$

$\sqrt{n} = \frac{40 \times 1.96}{6}$

$(\sqrt{n})^2 = \left(\frac{40 \times 1.96}{6}\right)^2$

n = 170.7.

Rounding up, a sample of 171 should be selected.

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

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2 years ago

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Answer:

Answer C

Step-by-step explanation:

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Answer:

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Sloan [31]

Answer:

the answer is 10

Step-by-step explanation:

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3 years ago

Describe a trend line in a scatterplot and how it should look in comparison to the data points​

Describe a trend line in a scatterplot and how it should look in comparison to the data points