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# Undergraduate Statistics Quiz

### 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?