🧠 GRE Exam Prep

A data set consists of five distinct positive integers. If each integer in the set is increased by 5, which of the following will be true?

A The mean will increase, and the standard deviation will remain the same.
B The mean will remain the same, and the standard deviation will increase.
C Both the mean and the standard deviation will increase.
D Both the mean and the standard deviation will remain the same.

✓ Correct Answer: Option A

Adding a constant value to every data point shifts the entire distribution. This increases the mean by that constant but does not change the spread of the data, so the standard deviation remains the same.

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