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monthly household cell phone bills are normally distributed with a standard deviation of $ 11.35.
a. What is the probability that a randomly selected monthly cell phone bill is more than $ 100?
b. What is the probability that a randomly selected monthly cell phone bill is between $ 60 and $ 83? c. What is the probability that a randomly selected monthly cell phone bill is between $ 80 and $ 90? d. What is the probability that a randomly selected monthly cell phone bill is no more than $ 55?
Question 3
A Travel Weekly International Air Transport Association survey asked business travelers about the purpose for their most recent business trip. 19 % responded that it was for an internal company visit. Suppose 950 business travelers are randomly selected.
a. What is the probability that more than 25 % of the business travelers say that the reason for their most recent business trip was an internal company visit?
b. What is the probability that between 15 % and 20 % of the business travelers say that the reason for their most recent business trip was an internal company visit?
monthly household cell phone bills are normally distributed with a standard deviation of $ 11.35.
a. What is the probability that a randomly selected monthly cell phone bill is more than $ 100?
b. What is the probability that a randomly selected monthly cell phone bill is between $ 60 and $ 83? c. What is the probability that a randomly selected monthly cell phone bill is between $ 80 and $ 90? d. What is the probability that a randomly selected monthly cell phone bill is no more than $ 55?
Question 3
A Travel Weekly International Air Transport Association survey asked business travelers about the purpose for their most recent business trip. 19 % responded that it was for an internal company visit. Suppose 950 business travelers are randomly selected.
a. What is the probability that more than 25 % of the business travelers say that the reason for their most recent business trip was an internal company visit?
b. What is the probability that between 15 % and 20 % of the business travelers say that the reason for their most recent business trip was an internal company visit?