(a) Find the probability that a study participant has a height that is less than 66 inches. The probability that the study participant selected at random is less than 66 inches tall is (Round to four decimal places as needed.) (b) Find the probability that a study participant has a height that is between 66 and 72 inches. The probability that the study participant selected at random is between 66 and 72 inches tall is (Round to four decimal places as needed.) (c) Find the probability that a study participant has a height that is more than 72 inches. The probability that the study participant selected at random is more than 72 inches tall is (Round to four decimal places as needed.) (d) Identify any unusual events. Explain your reasoning. Choose the correct answer below. O A. There are no unusual events because all the probabilities are greater than 0.05. O B. The event in part (a) is unusual because its probability is less than 0.05. OC. The events in parts (a), (b), and (c) are unusual because all of their probabilities are less than 0.05. O D. The events in parts (a) and (c) are unusual because its probabilities are less than 0.05.
(a) Find the probability that a study participant has a height that is less than 66 inches. The probability that the study participant selected at random is less than 66 inches tall is (Round to four decimal places as needed.) (b) Find the probability that a study participant has a height that is between 66 and 72 inches. The probability that the study participant selected at random is between 66 and 72 inches tall is (Round to four decimal places as needed.) (c) Find the probability that a study participant has a height that is more than 72 inches. The probability that the study participant selected at random is more than 72 inches tall is (Round to four decimal places as needed.) (d) Identify any unusual events. Explain your reasoning. Choose the correct answer below. O A. There are no unusual events because all the probabilities are greater than 0.05. O B. The event in part (a) is unusual because its probability is less than 0.05. OC. The events in parts (a), (b), and (c) are unusual because all of their probabilities are less than 0.05. O D. The events in parts (a) and (c) are unusual because its probabilities are less than 0.05.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:In a survey of a group of men, the heights in the 20-29 age group were normally distributed, with a mean of 68.6 inches and a standard deviation of 4.0 inches. A study participant is
randomly selected. Complete parts (a) through (d) below.
(a) Find the probability that a study participant has a height that is less than 66 inches.
The probability that the study participant selected at random is less than 66 inches tall is
(Round to four decimal places as needed.)
(b) Find the probability that a study participant has a height that is between 66 and 72 inches.
The probability that the study participant selected at random is between 66 and 72 inches tall is
(Round to four decimal places as needed.)
(c) Find the probability that a study participant has a height that is more than 72 inches.
The probability that the study participant selected at random is more than 72 inches tall is
(Round to four decimal places as needed.)
(d) Identify any unusual events. Explain your reasoning. Choose the correct answer below.
A. There are no unusual events because all the probabilities are greater than 0.05.
B. The event in part (a) is unusual because its probability is less than 0.05.
C. The events in parts (a), (b), and (c) are unusual because all of their probabilities are less than 0.05.
O D. The events in parts (a) and (c) are unusual because its probabilities are less than 0.05.
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