STATS IN PSYCHOLOGY

Question

Assume your class took a final exam in psychology in which the scores produced a normal curve with a mean score of 80 and a standard deviation of 5.

 If the student scores within two standard deviations from the mean, what is the possible range of the student’s scores?

Answer 1

80 ± 2*5

80 - 2*5 = 70

80 + 2*5 = 90

So the range of possible values is from 70 to 90.