MCAT Math Question 35: Answer and Explanation
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Question: 35
5. A 95% confidence interval will fall within what distance from the mean?
- A. ±σ
- B. ±2σ
- C. ±3σ
- D. ±4σ
Correct Answer: B
Explanation:
Approximately 95% of values fall within two standard deviations (±2σ) of the mean for a normal distribution. A confidence interval is constructed using the same values. Approximately 68% of the values are within one standard deviation, and 99% are within three standard deviations, eliminating the other answer choices.