Heads up: this is an in-person section page. Online sections have no midterm exams, just one cumulative final. Everything below is still accurate revision material for Topics 5 and 6, but the exam structure it describes is not yours. Switch the course format at the top of the page if you are in an in-person section.
Exam 3 Review
Twenty questions across Topics 5 and 6. Thirteen are probability and expected value, seven are descriptive statistics. Five of the twenty — questions 2, 4, 12, 15 and 17 — are two-way tables or conditional probability, a quarter of the paper resting on one idea. They are scattered through the paper rather than grouped, so the idea keeps returning in a different costume.
What is on it
- 3Probability basics questions 1, 2, 3
- 2Counting questions 4, 5
- 3Expected value questions 6, 7, 13
- 5Two-way tables and conditional probability questions 8, 9, 10, 11, 12
- 5Distributions and averages questions 14, 15, 16, 17, 18
- 2Measures of spread questions 19, 20
What is not on it
- The normal distribution and the empirical rule. Topic 5 spends real time on this and none of it is examined.
- Margin of error.
- Permutations and combinations. Topic 6 teaches them; Exam 3 does not ask for them.
The 20 questions
Same order as the ALEKS Exam Review, so question 4 here is question 4 there.
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Walkthrough
coming Question 1. Mean, median, and mode: computations Topic 5 · Statistics -
Walkthrough
coming Question 2. The addition rule on a two-way table Topic 6 · Probability -
Walkthrough
coming Question 3. Weighted mean from tabular data Topic 5 · Statistics -
Walkthrough
coming Question 4. Conditional probability from a two-way table Topic 6 · Probability -
Walkthrough
coming Question 5. Sample standard deviation Topic 5 · Statistics -
Walkthrough
coming Question 6. Computing expected value in a game of chance Topic 6 · Probability -
Walkthrough
coming Question 7. Approximating the mean from a frequency distribution Topic 5 · Statistics -
Walkthrough
coming Question 8. Five-number summary and interquartile range Topic 5 · Statistics -
Walkthrough
coming Question 9. Experimental and theoretical probability Topic 6 · Probability -
Walkthrough
coming Question 10. Frequency distribution for non-grouped data Topic 5 · Statistics -
Walkthrough
coming Question 11. Introduction to expectation Topic 6 · Probability -
Walkthrough
coming Question 12. Relative frequencies in a contingency table Topic 6 · Probability -
Walkthrough
coming Question 13. Expected value in a business application Topic 6 · Probability -
Walkthrough
coming Question 14. Grouped frequency distribution and histogram Topic 5 · Statistics -
Walkthrough
coming Question 15. Conditional probability from a sample space Topic 6 · Probability -
Walkthrough
coming Question 16. Understanding likelihood Topic 6 · Probability -
Walkthrough
coming Question 17. Using conditional probability to make an inference Topic 6 · Probability -
Walkthrough
coming Question 18. Counting principle Topic 6 · Probability -
Walkthrough
coming Question 19. Probability of choosing from objects that are not distinct Topic 6 · Probability -
Walkthrough
coming Question 20. Probability of selecting one card from a standard deck Topic 6 · Probability
On the exam, but easy to miss
These are assessed but live on pages you have no other reason to open.
Frequency distributions → Also taught in the Topic 5 DQ 2 walkthrough. Onground sections do not submit discussion questions, so that page is worth no points to you and is easy to miss, but the skill is on the exam.On the day
- 20 questions.
- Taken in class under LockDown Browser.
- The ALEKS Exam Review that opens the week before is the same length and the same format as the exam itself. Treat it as a dress rehearsal, not a study guide: work through the material on this page first, then sit the review once, cleanly.
- A conversion table is provided inside the ALEKS question for any item that needs one. You are not expected to have the factors memorised.