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 practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Calculate the mean of the following data: 6, 2, 9, 5, 3.
💡 Hint: Add the numbers together and divide by how many data points there are.
Question 2
Easy
True or False: The standard deviation can be negative.
💡 Hint: Think about how we define standard deviation.
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 variance measure?
- Data average
- Data spread from the mean
- Data count
💡 Hint: Think of how variance relates to the average value of data points.
Question 2
True or False: Standard deviation is simply a squared measurement of variance.
- True
- False
💡 Hint: Consider the definition of standard deviation regarding variance.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You collected the following set of data: 5, 7, 5, 8, 12. Calculate the variance and standard deviation, and discuss the implications of these measurements.
💡 Hint: Go step-by-step, calculating the mean first, then varied deviations.
Question 2
Consider two sets of data: Set A: {6, 7, 8}, Set B: {2, 11, 12}. Calculate the variances for both sets and summarize differences in variability.
💡 Hint: Remember to find the mean for each set then calculate the squared differences.
Challenge and get performance evaluation