Learn Without Walls

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Module 2 Post-Assessment

Measure Your Learning Gains!

You've completed Module 2! Now take the same assessment you took at the beginning to see how much you've learned about descriptive statistics.

Why retake this? Comparing your pre and post scores shows your learning gains and mastery of descriptive statistics concepts!

5 questions - Takes about 5 minutes
Not graded - Just for your learning
No pressure - It's okay to guess!
Immediate feedback - See explanations after you submit

Your responses help us understand how this course helps students learn. All data is anonymous and used only for research purposes.

1 What is the mean (average) of this dataset?
5, 8, 12, 15, 20

10
12
60
15

2 A dataset is already sorted: 2, 5, 7, 9, 11. What is the median?

5
7
6.8
9

3 Two classes both have an average test score of 75. Class A has a standard deviation of 15, while Class B has a standard deviation of 3. What does this tell you?

Class A students all scored exactly 75
Class A scores are more spread out than Class B scores
Class B performed better overall
Class A has more students than Class B

4 A distribution of household incomes has a mean of $80,000 and a median of $55,000. What does this suggest?

The distribution is symmetric
The distribution is right-skewed (a few very high incomes pull the mean up)
The distribution is left-skewed
Most people earn $80,000

5 You're analyzing home prices in a neighborhood where most homes cost $200,000-$300,000, but there are three mansions worth over $5 million. Which measure of center would BEST represent a "typical" home price?

Mean (average)
Median (middle value)
Mode (most common value)
All three measures would work equally well

You must answer all 5 questions before submitting

Pre-Assessment Complete!

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Congratulations on completing Module 2!