A standardized test has a mean score of 500 points with a standard deviation of 100 points. Five students' scores are shown below. Adam: 575 Beth: 690 Carlos: 750 Doug: 280 Ella: 440 Which of the students have scores within two standard deviations of the mean?
A) Adam, Beth, Ella
B) Adam, Beth
C) Adam, Beth, Carlos, Ella
D) Carlos, Doug

Question

Quizplus · Accepted Answer

Scores within two standard deviations of the mean (300 to 700) are Adam (575) and Ella (440).

A Standardized Test Has a Mean Score of 500 Points