State the null and alternative hypothesis.

Question

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Answer 1

Question

Chapter 15.1, Problem 5SE

a.

To determine

State the null and alternative hypothesis.

b.

To determine

Find the degrees of freedom for the contingency table.

c.

To determine

Find the critical value of chi-square from Appendix E or from Excel’s function at 0.025 level of significance.

d.

To determine

Check whether the data provide sufficient evidence to conclude that the completion rate and prenotification are statistically independent or not and make conclusion.

e.

To determine

Find the cell that contribute most to the chi-square statistics.

f.

To determine

Find the expected frequencies that are too small.

g.

To determine

Interpret the p-value and calculate p-values using Excel function if necessary.

h.

To determine

Perform a two-tailed, two-sample z test for π1=π2 and verify that z2 is the same as the chi-square statistics.

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28. (a) Under what conditions do we say that two random variables X and Y are independent? (b) Demonstrate that if X and Y are independent, then it follows that E(XY) = E(X)E(Y); (e) Show by a counter example that the converse of (ii) is not necessarily true.

Answer 2

Question

Chapter 15.1, Problem 5SE

a.

To determine

State the null and alternative hypothesis.

b.

To determine

Find the degrees of freedom for the contingency table.

c.

To determine

Find the critical value of chi-square from Appendix E or from Excel’s function at 0.025 level of significance.

d.

To determine

Check whether the data provide sufficient evidence to conclude that the completion rate and prenotification are statistically independent or not and make conclusion.

e.

To determine

Find the cell that contribute most to the chi-square statistics.

f.

To determine

Find the expected frequencies that are too small.

g.

To determine

Interpret the p-value and calculate p-values using Excel function if necessary.

h.

To determine

Perform a two-tailed, two-sample z test for π1=π2 and verify that z2 is the same as the chi-square statistics.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 3

Question

Chapter 15.1, Problem 5SE

a.

To determine

State the null and alternative hypothesis.

b.

To determine

Find the degrees of freedom for the contingency table.

c.

To determine

Find the critical value of chi-square from Appendix E or from Excel’s function at 0.025 level of significance.

d.

To determine

Check whether the data provide sufficient evidence to conclude that the completion rate and prenotification are statistically independent or not and make conclusion.

e.

To determine

Find the cell that contribute most to the chi-square statistics.

f.

To determine

Find the expected frequencies that are too small.

g.

To determine

Interpret the p-value and calculate p-values using Excel function if necessary.

h.

To determine

Perform a two-tailed, two-sample z test for π1=π2 and verify that z2 is the same as the chi-square statistics.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 15.1, Problem 5SE

a.

To determine

State the null and alternative hypothesis.

b.

To determine

Find the degrees of freedom for the contingency table.

c.

To determine

Find the critical value of chi-square from Appendix E or from Excel’s function at 0.025 level of significance.

d.

To determine

Check whether the data provide sufficient evidence to conclude that the completion rate and prenotification are statistically independent or not and make conclusion.

e.

To determine

Find the cell that contribute most to the chi-square statistics.

f.

To determine

Find the expected frequencies that are too small.

g.

To determine

Interpret the p-value and calculate p-values using Excel function if necessary.

h.

To determine

Perform a two-tailed, two-sample z test for π1=π2 and verify that z2 is the same as the chi-square statistics.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 5

Chapter 15.1, Problem 5SE

a.

To determine

State the null and alternative hypothesis.

b.

To determine

Find the degrees of freedom for the contingency table.

c.

To determine

Find the critical value of chi-square from Appendix E or from Excel’s function at 0.025 level of significance.

d.

To determine

Check whether the data provide sufficient evidence to conclude that the completion rate and prenotification are statistically independent or not and make conclusion.

e.

To determine

Find the cell that contribute most to the chi-square statistics.

f.

To determine

Find the expected frequencies that are too small.

g.

To determine

Interpret the p-value and calculate p-values using Excel function if necessary.

h.

To determine

Perform a two-tailed, two-sample z test for π1=π2 and verify that z2 is the same as the chi-square statistics.

Answer 6

Chapter 15.1, Problem 5SE

a.

To determine

State the null and alternative hypothesis.

Answer 7

Chapter 15.1, Problem 5SE

a.

To determine

State the null and alternative hypothesis.

Answer 8

b.

To determine

Find the degrees of freedom for the contingency table.

Answer 9

b.

To determine

Find the degrees of freedom for the contingency table.

Answer 10

c.

To determine

Find the critical value of chi-square from Appendix E or from Excel’s function at 0.025 level of significance.

Answer 11

c.

To determine

Find the critical value of chi-square from Appendix E or from Excel’s function at 0.025 level of significance.

Answer 12

d.

To determine

Check whether the data provide sufficient evidence to conclude that the completion rate and prenotification are statistically independent or not and make conclusion.

Answer 13

d.

To determine

Check whether the data provide sufficient evidence to conclude that the completion rate and prenotification are statistically independent or not and make conclusion.

Answer 14

e.

To determine

Find the cell that contribute most to the chi-square statistics.

Answer 15

e.

To determine

Find the cell that contribute most to the chi-square statistics.

Answer 16

f.

To determine

Find the expected frequencies that are too small.

Answer 17

f.

To determine

Find the expected frequencies that are too small.

Answer 18

g.

To determine

Interpret the p-value and calculate p-values using Excel function if necessary.

Answer 19

g.

To determine

Interpret the p-value and calculate p-values using Excel function if necessary.

Answer 20

h.

To determine

Perform a two-tailed, two-sample z test for π1=π2 and verify that z2 is the same as the chi-square statistics.

Answer 21

h.

To determine

Perform a two-tailed, two-sample z test for π1=π2 and verify that z2 is the same as the chi-square statistics.

Answer 22

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Answer 23

Expert Solution & Answer

Answer 24

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Answer 25

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State the null and alternative hypothesis.

Solution Summary: The author states that the table summarizes the completion rate and prenotification. If the claim is rejected, they are not independent.

Videos

State the null and alternative hypothesis.

Find the degrees of freedom for the contingency table.

Find the critical value of chi-square from Appendix E or from Excel’s function at 0.025 level of significance.

Check whether the data provide sufficient evidence to conclude that the completion rate and prenotification are statistically independent or not and make conclusion.

Find the cell that contribute most to the chi-square statistics.

Find the expected frequencies that are too small.

Interpret the p-value and calculate p-values using Excel function if necessary.

Perform a two-tailed, two-sample z test for π1=π2 and verify that z2 is the same as the chi-square statistics.

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Chapter 15 Solutions