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Question 1
An Adweek Media/Harris Poll revealed that 44% of U.S. adults in
the 18–34 years category think that “Made in America” ads boost
sales. A different Harris Interactive poll showed that 78% of U.S.
adults in the 18–34 years category use social media online. Suppose
that 85% of U.S. adults in the 18–34 years category think that
“Made in America” ads boost sales or use social media online.
If a U.S. adult in the 18–34 years category is randomly selected
a.
Whatistheprobabilitythatthepersonthinksthat“MadeinAmerica”ads
boostsalesanduses social media online?
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.