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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the arithmetic mean of 5, 10, and 15?
💡 Hint: Add the numbers and divide by how many there are.
Question 2
Easy
If the average time of 4 measurements of 3.7, 3.9, 3.6, and 3.8 seconds is asked, what is it?
💡 Hint: Calculate the total sum then divide by 4.
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 the mean represent in a data set?
- The most frequent value
- The sum of values divided by the count
- The value that represents the maximum
💡 Hint: Think about how you find the average.
Question 2
Is a low standard deviation indicative of closely clustered data points?
- True
- False
💡 Hint: Recall the meaning of standard deviation.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A researcher records the following weights (in grams) of apples: 150, 152, 148, 149. Calculate the mean and standard deviation.
💡 Hint: First calculate the mean, followed by deviations from that mean.
Question 2
Given a set of measurements with a mean of 20 and standard deviation of 4, what would be the 95% confidence interval if N = 25?
💡 Hint: Recall the formula for confidence intervals involves the SEM and a Z-score for the desired confidence level.
Challenge and get performance evaluation