MCAT Math Question 40: Answer and Explanation
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Question: 40
10. As the confidence level increases, a confidence interval:
- A. becomes wider.
- B. becomes thinner.
- C. shifts to higher values.
- D. shifts to lower values.
Correct Answer: A
Explanation:
To increase the confidence level, one must increase the size of the confidence interval to make it more likely that the true value of the mean is within the range. Therefore, the confidence interval must become wider.