if the mean score of 18 witha standard deviation of 6, what is the percentage of scores more than 25

Question

mean 18, standsrd deviation 6, percentage of 25 or more

Answer 1

First we need the Z-score=(25-18)/6=7/6=1.1667. According to tables, 87.83% of scores are less than 25, therefore 12.17% are greater than 25.