Question

A standardized test is designed so that scores have a mean of 50 and a standard deviation of 4. What

percent of scores are between 42 and 58?
42
O 100%
46
about 95.4%
about 23.85%
about 47.7%
50
54
47.7%
58

Answer 1

Answer: about 95.4%

Step-by-step explanation: 47.7% of scores are within two standard deviations to the right of the mean. Use that percent and the fact that the graph is symmetric to find the percentage of scores within two standard deviations to the right and left of the mean.

47.7% + 47.7% = 95.4%