Math 243 Probability and Statistics Homework Problems

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 (r2) and standard error of the estimate (sest) for Problem 24 from Sections 10-1 and 10-2.

Problems marked with % have a note below:
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: 10-1 #24:  The instructions for Problems 11-27 are right before Problem 11.
10-2 #24:  You can draw the scatter plot again or draw the best-fit line on the one you already made.