Learn Without Walls

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Module 4 Post-Assessment

Test your learning gains of normal distributions

About This Assessment

This pre-assessment helps us understand what you have learned about normal distributions after completing the module. Your responses are for learning purposes only—don't worry if you don't know the answers yet! That's what the lessons are for.

5 questions covering key normal distribution concepts
No time limit – take your time
Not graded – this is just to measure your starting point
You'll take the same assessment after completing the module to measure your learning gains

1 Which of the following best describes a normal distribution?

A distribution that is always skewed to the right
A symmetric, bell-shaped distribution where mean = median = mode
A distribution with two peaks
A uniform distribution where all values are equally likely

2 According to the Empirical Rule (68-95-99.7 rule), approximately what percentage of data falls within one standard deviation of the mean in a normal distribution?

50%
68%
95%
99.7%

3 What does a z-score of 2.0 indicate?

The value is exactly 2
The value is 2 standard deviations above the mean
The value is 2 standard deviations below the mean
The value is twice the mean

4 A test has a mean score of 75 and a standard deviation of 10. If the scores are normally distributed, what percentage of students scored between 65 and 85?

About 50%
About 68%
About 95%
About 99.7%

5 What is the standard normal distribution?

Any normal distribution
A normal distribution with mean = 0 and standard deviation = 1
A normal distribution with mean = 100 and standard deviation = 15
A uniform distribution

Remember: This is not graded. It's just to see what you know before starting the module.

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