Question: According to ACT, results from the 2008 ACT test-ing found that students had a mean reading score of 21.4 with a standard deviation of 6.0.

According to ACT, results from the 2008 ACT test-ing found that students had a mean reading score of 21.4 with a standard deviation of 6.0. Assuming that the scores are normally distributed,
a. find the probability that a randomly selected student had a reading ACT score less than 20.
b. find the probability that a randomly selected student had a reading ACT score between 18 and 24.
c. find the probability that a randomly selected student had a reading ACT score greater than 30.
d. find the value of the 75th percentile for ACT scores.

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a Px 20 Pz 20 21460 Pz 023 04090 b P18 x 24 P18 21460 z 24 ... View full answer

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