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 = 130 if X ~ N(120, 10)?
💡 Hint: Remember, Z is calculated as (X - μ) / σ.
Question 2
Easy
What does a Z-score of 0 signify?
💡 Hint: Think about the position relative to the average.
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 does standardizing a normal variable help us achieve?
- A) Make it more complex
- B) Compute probabilities easily
- C) Reduce the mean
💡 Hint: Think about the purpose of the Z-table.
Question 2
True or False: When a Z-score is negative, it means the value is above the mean.
- True
- False
💡 Hint: Reflect on the Z-score definition.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A dataset has a mean of 150 and a standard deviation of 30. Find the Z-score for a value of 180 and interpret it.
💡 Hint: Standardize to interpret the position relative to the mean.
Question 2
If a student needs to be in the top 10% for a test scored normally distributed with a mean 75 and a standard deviation of 10, what score must they achieve?
💡 Hint: Use Z-tables for percentile lookup.
Challenge and get performance evaluation