SOLUTION: In 2000 act mean was 20.7 normal distribution was 5 what is the probability that a random selected student has a act of at least 25

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Question 1125808: In 2000 act mean was 20.7 normal distribution was 5 what is the probability that a random selected student has a act of at least 25
Answer by Boreal(15235) About Me  (Show Source):
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if mean was 20.7 and sd 5
z=(x-mean)/sd or 4.5/5 or 0.86
probability z > 0.86 is 0.1949