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 8 through 12 — are two-way tables and conditional probability, which is a quarter of the paper resting on one idea.
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.
Practice, in ALEKS order
These run in the same order as the ALEKS Exam Review, so item 4 here is question 4 there. Work down the list, then sit the review once.
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Practice ready
Question 1. Probability of choosing from objects that are not distinct
Question 1 Probability involving choosing from objects that are not distinct →Different from the review question it resembles: there the objects are all different, here several share a colour, and the counting changes.
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Practice ready
Question 2. Understanding likelihood
Question 2 Understanding likelihood → -
Practice ready
Question 3. Experimental and theoretical probability
Question 3 Experimental and theoretical probability for a single event → -
Practice ready
Question 4. Counting principle
Question 4 Counting principle → -
Practice ready
Question 5. Probability of selecting one card from a standard deck
Question 5 Probability of selecting one card from a standard deck → -
Practice ready
Question 6. Introduction to expectation
Question 6 Introduction to expectation → -
Practice ready
Question 7. Computing expected value in a game of chance
Question 7 Computing expected value in a game of chance → -
Practice ready
Question 8. The addition rule on a two-way table
Question 8 Reading a two-way frequency table → -
Practice ready
Question 9. Conditional probability from a sample space
Question 9 Computing conditional probability using a sample space → -
Practice ready
Question 10. Conditional probability from a two-way table
Question 10 Conditional probability from a two-way table, and what it tells you → -
Practice ready
Question 11. Using conditional probability to make an inference
Question 11 Conditional probability from a two-way table, and what it tells you →Same item as question 10, second half. Compare the conditional rate against the overall rate and say whether the two look related.
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Practice ready
Question 12. Relative frequencies in a contingency table
Question 12 Reading a two-way frequency table →Same item as question 8, second half.
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Practice ready
Question 13. Expected value in a business application
Question 13 Expected value applied to a business decision → -
Practice ready
Question 14. Frequency distribution for non-grouped data
Question 14 Constructing a frequency distribution for non-grouped data → -
Practice ready
Question 15. Grouped frequency distribution and histogram
Question 15 Constructing a grouped frequency distribution and a histogram → -
Practice ready
Question 16. Weighted mean from tabular data
Question 16 Finding a mean from tabular data → -
Practice ready
Question 17. Approximating the mean from a frequency distribution
Question 17 Finding a mean from tabular data →Same item as question 16, second half. Same formula, using class midpoints because the exact values are gone.
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Practice ready
Question 18. Mean, median, and mode: computations
Question 18 Mean, median, and mode: computations →ALEKS asks HOW MANY modes the set has - zero, one or two - not what the mode is. The topic review question presupposes exactly one exists.
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Practice ready
Question 19. Sample standard deviation
Question 19 Measuring spread: standard deviation and the five-number summary → -
Practice ready
Question 20. Five-number summary and interquartile range
Question 20 Measuring spread: standard deviation and the five-number summary →Same item as question 19, second half.
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.