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
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the non-negativity property of variance?
💡 Hint: What happens when you square a number?
Question 2
Easy
Explain the impact of an outlier on standard deviation.
💡 Hint: What does an extreme value in the dataset do?
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 minimum value of variance?
- -1
- 0
- 1
💡 Hint: Think about squaring numbers.
Question 2
True or False: Standard deviation can be negative.
- True
- False
💡 Hint: What does that square root do?
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given the data set {5, 6, 8, 10, 15}, calculate the variance. Discuss the role a high value (15) plays in your computation.
💡 Hint: Make sure to calculate the squared differences.
Question 2
You have two morphological measurements of a model, both with variances of 25. If you scale one by a factor of -4, what is the new variance, and what does it signify?
💡 Hint: Remember how to apply the scaling rule to variance.
Challenge and get performance evaluation