20.3 - Standard Normal Distribution
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What is the Z-score for a value of 50 with a mean of 50 and a standard deviation of 10?
💡 Hint: Think about how many standard deviations away it is from the mean.
If X = 60, μ = 50, and σ = 5, what is the Z-score?
💡 Hint: Subtract the mean and then divide by the standard deviation.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the mean of the Standard Normal Distribution?
💡 Hint: Remember, all values are standardized!
True or False: The standard deviation of the Standard Normal Distribution is 1.
💡 Hint: Think about the standardization process!
2 more questions available
Challenge Problems
Push your limits with advanced challenges
A distribution has μ = 100 and σ = 15. Calculate the Z-score for a value of 130 and the associated probability.
💡 Hint: Start with the Z-score formula, then use the table to find the area.
In a sample of test scores with μ = 50 and σ = 5, what is the probability that a score is lower than 48?
💡 Hint: Know how to interpret the negative Z-scores in the table.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.