Question
assume that a set of test scores is normally distributes with a mean of 120 and a standard deviation of 25. use the 68-95-99.7 rule to find the percentage of scores greater tha 145
Answers
Scott
145 is one s.d. above the mean
68% of scores are in this range
34% are above the mean
50% of scores are below the mean
that leaves 16% of scores above 145
68% of scores are in this range
34% are above the mean
50% of scores are below the mean
that leaves 16% of scores above 145