The claim and state H 0 and H a .

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Answer 1

Question

Chapter 11, Problem 11.2.7RE

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To decide: Whether to use a Wilcoxon signed-rank test or Wilcoxon rank sum test.

c.

To determine

To find: The critical values.

d.

To determine

To find: The test statistic.

e.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.01 .

f.

To determine

To interpret: The decision in the context of the original claim.

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ons 12. A sociologist hypothesizes that the crime rate is higher in areas with higher poverty rate and lower median income. She col- lects data on the crime rate (crimes per 100,000 residents), the poverty rate (in %), and the median income (in $1,000s) from 41 New England cities. A portion of the regression results is shown in the following table. Standard Coefficients error t stat p-value Intercept -301.62 549.71 -0.55 0.5864 Poverty 53.16 14.22 3.74 0.0006 Income 4.95 8.26 0.60 0.5526 a. b. Are the signs as expected on the slope coefficients? Predict the crime rate in an area with a poverty rate of 20% and a median income of $50,000. 3. Using data from 50 work

2. The owner of several used-car dealerships believes that the selling price of a used car can best be predicted using the car's age. He uses data on the recent selling price (in $) and age of 20 used sedans to estimate Price = Po + B₁Age + ε. A portion of the regression results is shown in the accompanying table. Standard Coefficients Intercept 21187.94 Error 733.42 t Stat p-value 28.89 1.56E-16 Age -1208.25 128.95 -9.37 2.41E-08 a. What is the estimate for B₁? Interpret this value. b. What is the sample regression equation? C. Predict the selling price of a 5-year-old sedan.

ian income of $50,000. erty rate of 13. Using data from 50 workers, a researcher estimates Wage = Bo+B,Education + B₂Experience + B3Age+e, where Wage is the hourly wage rate and Education, Experience, and Age are the years of higher education, the years of experience, and the age of the worker, respectively. A portion of the regression results is shown in the following table. ni ogolloo bash 1 Standard Coefficients error t stat p-value Intercept 7.87 4.09 1.93 0.0603 Education 1.44 0.34 4.24 0.0001 Experience 0.45 0.14 3.16 0.0028 Age -0.01 0.08 -0.14 0.8920 a. Interpret the estimated coefficients for Education and Experience. b. Predict the hourly wage rate for a 30-year-old worker with four years of higher education and three years of experience.

Answer 2

Question

Chapter 11, Problem 11.2.7RE

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To decide: Whether to use a Wilcoxon signed-rank test or Wilcoxon rank sum test.

c.

To determine

To find: The critical values.

d.

To determine

To find: The test statistic.

e.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.01 .

f.

To determine

To interpret: The decision in the context of the original claim.

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Answer 3

Question

Chapter 11, Problem 11.2.7RE

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To decide: Whether to use a Wilcoxon signed-rank test or Wilcoxon rank sum test.

c.

To determine

To find: The critical values.

d.

To determine

To find: The test statistic.

e.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.01 .

f.

To determine

To interpret: The decision in the context of the original claim.

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Answer 4

Question

Chapter 11, Problem 11.2.7RE

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To decide: Whether to use a Wilcoxon signed-rank test or Wilcoxon rank sum test.

c.

To determine

To find: The critical values.

d.

To determine

To find: The test statistic.

e.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.01 .

f.

To determine

To interpret: The decision in the context of the original claim.

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Answer 5

Chapter 11, Problem 11.2.7RE

a.

To determine

To identify: The claim and state H0 and Ha .

b.

To determine

To decide: Whether to use a Wilcoxon signed-rank test or Wilcoxon rank sum test.

c.

To determine

To find: The critical values.

d.

To determine

To find: The test statistic.

e.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.01 .

f.

To determine

To interpret: The decision in the context of the original claim.

Answer 6

Chapter 11, Problem 11.2.7RE

a.

To determine

To identify: The claim and state H0 and Ha .

Answer 7

Chapter 11, Problem 11.2.7RE

a.

To determine

To identify: The claim and state H0 and Ha .

Answer 8

b.

To determine

To decide: Whether to use a Wilcoxon signed-rank test or Wilcoxon rank sum test.

Answer 9

b.

To determine

To decide: Whether to use a Wilcoxon signed-rank test or Wilcoxon rank sum test.

Answer 10

c.

To determine

To find: The critical values.

Answer 11

c.

To determine

To find: The critical values.

Answer 12

d.

To determine

To find: The test statistic.

Answer 13

d.

To determine

To find: The test statistic.

Answer 14

e.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.01 .

Answer 15

e.

To determine

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.01 .

Answer 16

f.

To determine

To interpret: The decision in the context of the original claim.

Answer 17

f.

To determine

To interpret: The decision in the context of the original claim.

Answer 18

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Answer 19

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Answer 20

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Answer 21

Ch. 11.1 - Prob. 1TY Ch. 11.1 - Prob. 2TY Ch. 11.1 - Prob. 3TY Ch. 11.1 - Prob. 1E Ch. 11.1 - When the sign test is used, what population...Ch. 11.1 - Describe the test statistic for the sign test when...Ch. 11.1 - In your own words, explain why the hypothesis test...Ch. 11.1 - Explain how to use the sign test to test a...Ch. 11.1 - List the two conditions that must be met in order...Ch. 11.1 - Prob. 7E

The claim and state H 0 and H a .

To identify: The claim and state H0 and Ha .

To decide: Whether to use a Wilcoxon signed-rank test or Wilcoxon rank sum test.

To find: The critical values.

To find: The test statistic.

To decide: Whether to reject or fail to reject the null hypothesis at a level of significance of α=0.01 .

To interpret: The decision in the context of the original claim.

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Chapter 11 Solutions