Suppose you have a normal distribution of test scores with a mean of 60 and a standard deviation of 10. Which range of test scores contains 68 percent of the scores?

Question

Quizplus · Accepted Answer

Since we are dealing with a normal distribution, we know that approximately 68% of the scores fall within one standard deviation of the mean. In this case, that means scores between 50 and 70 (mean ± 1 standard deviation) will contain 68% of the scores. Therefore, choice C is the best answer.

Suppose You Have a Normal Distribution of Test Scores with a Mean