Find the level of significance. State the null and alternative hypothesis.

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can you explain why my answer to Q2 was wrong and, how to get the correct answer

Answer 1

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8.5, Problem 21P

(a)

To determine

Find the level of significance.

State the null and alternative hypothesis.

(b)

To determine

Identify the sampling distribution to be used.

Mention the assumption to test.

Find the sample test statistic.

Find the t value.

(c)

To determine

Find the P-value.

Draw the sampling distribution by showing the area corresponding to the P-value.

(d)

To determine

Check whether the null hypothesis is rejecting or fail to reject.

Identify whether the data statistically significant at level 0.05 or not.

(e)

To determine

Interpret the conclusion in the context of the application.

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Answer 2

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8.5, Problem 21P

(a)

To determine

Find the level of significance.

State the null and alternative hypothesis.

(b)

To determine

Identify the sampling distribution to be used.

Mention the assumption to test.

Find the sample test statistic.

Find the t value.

(c)

To determine

Find the P-value.

Draw the sampling distribution by showing the area corresponding to the P-value.

(d)

To determine

Check whether the null hypothesis is rejecting or fail to reject.

Identify whether the data statistically significant at level 0.05 or not.

(e)

To determine

Interpret the conclusion in the context of the application.

Expert Solution & Answer

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Answer 3

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8.5, Problem 21P

(a)

To determine

Find the level of significance.

State the null and alternative hypothesis.

(b)

To determine

Identify the sampling distribution to be used.

Mention the assumption to test.

Find the sample test statistic.

Find the t value.

(c)

To determine

Find the P-value.

Draw the sampling distribution by showing the area corresponding to the P-value.

(d)

To determine

Check whether the null hypothesis is rejecting or fail to reject.

Identify whether the data statistically significant at level 0.05 or not.

(e)

To determine

Interpret the conclusion in the context of the application.

Expert Solution & Answer

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Answer 4

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8.5, Problem 21P

(a)

To determine

Find the level of significance.

State the null and alternative hypothesis.

(b)

To determine

Identify the sampling distribution to be used.

Mention the assumption to test.

Find the sample test statistic.

Find the t value.

(c)

To determine

Find the P-value.

Draw the sampling distribution by showing the area corresponding to the P-value.

(d)

To determine

Check whether the null hypothesis is rejecting or fail to reject.

Identify whether the data statistically significant at level 0.05 or not.

(e)

To determine

Interpret the conclusion in the context of the application.

Expert Solution & Answer

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Answer 5

Chapter 8.5, Problem 21P

(a)

To determine

Find the level of significance.

State the null and alternative hypothesis.

(b)

To determine

Identify the sampling distribution to be used.

Mention the assumption to test.

Find the sample test statistic.

Find the t value.

(c)

To determine

Find the P-value.

Draw the sampling distribution by showing the area corresponding to the P-value.

(d)

To determine

Check whether the null hypothesis is rejecting or fail to reject.

Identify whether the data statistically significant at level 0.05 or not.

(e)

To determine

Interpret the conclusion in the context of the application.

Answer 6

Chapter 8.5, Problem 21P

(a)

To determine

Find the level of significance.

State the null and alternative hypothesis.

Answer 7

Chapter 8.5, Problem 21P

(a)

To determine

Find the level of significance.

State the null and alternative hypothesis.

Answer 8

(b)

To determine

Identify the sampling distribution to be used.

Mention the assumption to test.

Find the sample test statistic.

Find the t value.

Answer 9

(b)

To determine

Identify the sampling distribution to be used.

Mention the assumption to test.

Find the sample test statistic.

Find the t value.

Answer 10

(c)

To determine

Find the P-value.

Draw the sampling distribution by showing the area corresponding to the P-value.

Answer 11

(c)

To determine

Find the P-value.

Draw the sampling distribution by showing the area corresponding to the P-value.

Answer 12

(d)

To determine

Check whether the null hypothesis is rejecting or fail to reject.

Identify whether the data statistically significant at level 0.05 or not.

Answer 13

(d)

To determine

Check whether the null hypothesis is rejecting or fail to reject.

Identify whether the data statistically significant at level 0.05 or not.

Answer 14

(e)

To determine

Interpret the conclusion in the context of the application.

Answer 15

(e)

To determine

Interpret the conclusion in the context of the application.

Answer 16

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Answer 17

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Answer 26

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Answer 27

Find the level of significance. State the null and alternative hypothesis.

Solution Summary: The author states the null and alternative hypothesis. The level of significance is 0.05.

Concept explainers

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Find the level of significance.

State the null and alternative hypothesis.

Identify the sampling distribution to be used.

Mention the assumption to test.

Find the sample test statistic.

Find the t value.

Find the P-value.

Draw the sampling distribution by showing the area corresponding to the P-value.

Check whether the null hypothesis is rejecting or fail to reject.

Identify whether the data statistically significant at level 0.05 or not.

Interpret the conclusion in the context of the application.

Chapter 8 Solutions

Find the level of significance. State the null and alternative hypothesis.

Solution Summary: The author states the null and alternative hypothesis. The level of significance is 0.05.

Concept explainers

Videos

Find the level of significance. State the null and alternative hypothesis.

Identify the sampling distribution to be used. Mention the assumption to test. Find the sample test statistic. Find the t value.

Find the P-value. Draw the sampling distribution by showing the area corresponding to the P-value.

Check whether the null hypothesis is rejecting or fail to reject. Identify whether the data statistically significant at level 0.05 or not.

Interpret the conclusion in the context of the application.

Chapter 8 Solutions

Find the level of significance.

State the null and alternative hypothesis.

Identify the sampling distribution to be used.

Mention the assumption to test.

Find the sample test statistic.

Find the t value.

Find the P-value.

Draw the sampling distribution by showing the area corresponding to the P-value.

Check whether the null hypothesis is rejecting or fail to reject.

Identify whether the data statistically significant at level 0.05 or not.