Business, 03.08.2021 17:40, therealrg10

In a recent year, the scores for the reading portion of a test were normally distributed, with a mean of 23.3 and a standard deviation of 6.4 . Complete parts (a) through (d) below. (a) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is less than 18 . The probability of a student scoring less than 18 is nothing . (Round to four decimal places as needed.)
(b) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is between 19.9 and 26.7 . The probability of a student scoring between 19.9 and 26.7 is nothing . (Round to four decimal places as needed.)
(c) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is more than 36.4 . The probability of a student scoring more than 36.4 is nothing . (Round to four decimal places as needed.)
(d) Identify any unusual events. Explain your reasoning. Choose the correct answer below.
A. None of the events are unusual because all the probabilities are greater than 0.05.
B. The events in parts left parenthesis a right parenthesis and left parenthesis b right parenthesis are unusual because its probabilities are less than 0.05.

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In a recent year, the scores for the reading portion of a test were normally distributed, with a m...