Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
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 mock test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the Z-score for X = 54 when X ~ N(50, 8)?
💡 Hint: Use Z = (X - μ) / σ.
Question 2
Easy
If P(Z < 1) is 0.8413, what is P(Z < -1)?
💡 Hint: Look at the symmetry of the distribution.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the Z-score when X = 60, μ = 50, and σ = 10?
- 1
- 0.5
- 2
💡 Hint: Remember the Z-score formula.
Question 2
True or False: In a normal distribution, mean, median, and mode are equal.
- True
- False
💡 Hint: Think about the symmetry of the distribution.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A factory produces part sizes that are normally distributed with a mean of 50mm and a standard deviation of 5mm. What is the probability that a part will be between 47mm and 53mm?
💡 Hint: Use Z = (X - μ) / σ to convert.
Question 2
If test scores are normally distributed with a mean of 75 and a standard deviation of 10, what score would you need to be in the top 2%?
💡 Hint: Use the standard Z-table for the 98th percentile.
Challenge and get performance evaluation