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Undergraduate Statistics Quiz

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1. What is the median of the following set of numbers: 3, 7, 9, 15, and 21?

2. If the probability of an event A is 0.20, what is the probability of the complement of A?

3. Which of the following measures of central tendency is most affected by outliers?

4. What is the standard deviation?

5. In hypothesis testing, a Type I error occurs when:

6. What does a p-value of 0.05 or less generally indicate in hypothesis testing?

7. What is the mode of the following set of numbers: 4, 8, 2, 4, 9, 4, and 3?

8. What percentage of data falls within one standard deviation of the mean in a normal distribution?

9. If two events A and B are independent, what is the probability of both A and B occurring?

10. What is the first quartile of a data set?