What is the standard deviation of the data set {10, 10, 10, 10}?

A 10

B 0

C 1

D 5

✓ Correct Answer: Option B

When all values are identical, there is no variation from the mean. Standard deviation = 0.

💡 Why is B) the correct answer?

The correct answer to the question "What is the standard deviation of the data set {10, 10, 10, 10}?" is Option B: 0.

The other options — A) 10, C) 1, D) 5 — are incorrect for this PCAT Exam Prep question. As explained above: When all values are identical, there is no variation from the mean. Standard deviation = 0.

📚 About This PCAT Exam Prep Practice Question

This 1-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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What is the standard deviation of the data set {10, 10, 10, 10}?

✓ Correct Answer: Option B

📚 About This PCAT Exam Prep Practice Question

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