GB 513 RANK Imagine Your Future /gb513rank.com GB 513 RANK Imagine Your Future /gb513rank.com | Page 5

b. What is the probability that the person thinks that “Made in
America” ads boost sales given that the person does not use social
media online?
Question 2
According to a report by Scarborough Research, the average
monthly household cellular phone bill is $73. Suppose local 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?