Below are the required homework problems from each section covered in the textbook. Homework should be scanned and uploaded to the appropriate section assignment.

**Chapter 2**

2-1: 13, 19.

2-2: 1.

2-3: 3, 17, 20.

**Chapter 3**

3-1: 1, 11, 15^{%}, 24.

3-2: 9^{%}, 15, 31, 37.

3-3: 11, 12, 17.

**Chapter 4**

4-1: 10, 13, 14, 17, 18, 33^{%}, 35.

4-2: 3, 4, 5, 9, 23.

4-3: 1, 2, 13, 31^{%}, 35, 43.

4-4: 7, 9, 13, 23, 33, 37, 63, 65.

4-5: 1, 3, 11abc, 14.

**Chapter 5**

5-1: 7, 10, 11, 13, 16, 17, 21, 23.

5-2: 1, 3, 11, 15.

5-3: 5, 6, 13^{%}, 17, 19.

5-4: 1, 3, 7, 8, 9.

**Chapter 6**

6-1: 11, 13, 18, 31, 35, 39, 41, 42, 43, 45.

6-2: 11, 15^{%}, 29, 39.

6-3: 9, 15.

6-4: 5, 6, 7, 8, 9, 13, 15.

**Chapter 7**

7-1: 7, 11, 23.

7-2: 3, 8, 15.

7-4: 3, 11, 15.

**Chapter 8**^{%}

8-1: 11^{%}, 12^{%}, 13^{%}, 14^{%}.

8-2: 5^{%}, 21^{%}.

8-3: 3^{%}, 4^{%}, 17^{%}, 22^{%}.

8-4: 9^{%}, 12^{%}.

8-5: 1^{%}, 2^{%}, 7^{%}, 14^{%}.

**Chapter 9**^{%}

9-1: 5^{%}, 9^{%}.

9-2: 15^{%}, 19^{%}.

9-4: 3^{%}, 6^{%}, 11^{%}, 25^{%}.

9-5: 5^{%}, 19^{%}, 23^{%}.

**Chapter 10**

10-1: 24ab^{%}.

10-2: 24 and plot the best-fit line on the scatter plot from Problem 24 of Section 10-1^{%}.

10-3: Calculate the coefficient of determination (*r* ^{2}) and standard error of the estimate (*s _{est}*) for Problem 24 from Sections 10-1 and 10-2.

3-1 #15: Modal class is the class with the highest frequency.

3-2 #9: Use the coefficient of variation (CV) to decide which set is more variable.

4-1 #33: The 13.5 million automobile accidents, 5.2 million truck accidents, and 178,000 motorcycle accidents are all separate (the trucks and motorcycles are not considered automobiles in this problem).

4-3 #31: The numbers in the second row are also percentages.

5-3 #13: Some printings apparently have an incorrect answer in the back for #13 part c. The correct answer is 0.317.

6-2 #15: Some printings apparently have an incorrect answer in the back for #15 part b. The correct answer is 0.749.

8-1 #11, 12: We cover left- and right-tailed problems in Section 8-2, so you should wait to do those until after we cover 8-2.

8-1 #13, 14: We cover problems where the claim has something other than "=" or "≠" in Section 8-2, so you should wait to do those until after we cover 8-2.

Chapters 8 and 9:

- The book only gives 5 steps for hypothesis testing. It amounts to doing the same thing that we do in 7 steps. You should follow our 7-step method.
- The book always uses "=" for the null hypothesis, but you should use "=", "≤", or "≥" the way we did in class.
- The book often says to use the tables to find the critical values. You can also use your calculator if you prefer.
- Ignore anything the homework says about the "
*P*-Value Method." That's an alternate way of handling our Steps 4 and 6, but we will not cover it in this class. If they ask you to use the*P*-Value Method, just use our usual techniques. - Some problems ask for confidence intervals in addition to asking you to test a claim. Just test the claim. You can skip the confidence intervals.
- Some problems begin with a general statement about the population(s) before giving information from the sample(s). They are just trying to give background information for why the hypothesis test might be done. Be careful to use the sample data in your test, not this (unsupported) population data.

10-2 #24: You can draw the scatter plot again or draw the best-fit line on the one you already made.