No Registration Required

# Confidence Intervals Mastery Quiz

### 1. Which of the following best describes a confidence interval?

### 2. What does a 95% confidence interval imply?

### 3. Which of the following is necessary to calculate a confidence interval for a population mean when the population standard deviation is known?

### 4. When constructing a confidence interval for the mean of a small sample (n<30), which distribution should be used?

### 5. What effect does increasing the sample size have on the width of a confidence interval?

### 6. What is the primary purpose of a confidence interval in statistics?

### 7. Which component affects the width of a confidence interval?

### 8. In the context of confidence intervals, what does the term 'margin of error' refer to?

### 9. Which of the following accurately describes the relation between confidence interval width and confidence level?

### 10. What is the impact of a higher standard deviation of the sample on the confidence interval for the mean?