The area under a normal distribution curve between ±1 standard deviation is approximately:

A 95%

B 68%

C 99.7%

D 50%

✓ Correct Answer: Option B

In a normal distribution: ~68% within ±1 SD, ~95% within ±2 SD, ~99.7% within ±3 SD.

💡 Why is B) the correct answer?

The correct answer to the question "The area under a normal distribution curve between ±1 standard deviation is approximately:" is Option B: 68%.

The other options — A) 95%, C) 99.7%, D) 50% — are incorrect for this PCAT Exam Prep question. As explained above: In a normal distribution: ~68% within ±1 SD, ~95% within ±2 SD, ~99.7% within ±3 SD.

📚 About This PCAT Exam Prep Practice Question

This 2-level PCAT Exam Prep question from the Quantitative Reasoning topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free PCAT Exam Prep practice test or use flashcards for spaced repetition review.

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The area under a normal distribution curve between ±1 standard deviation is approximately:

✓ Correct Answer: Option B

📚 About This PCAT Exam Prep Practice Question

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