Questions from Statistics

Q: Suppose a college wishes to select the location of an electric car

Suppose a college wishes to select the location of an electric car charging station on campus based on student preference. They have 3 possible locations and are asking a random sample of students to...

Q: Suppose a college is deciding whether or not to allocate more resources

Suppose a college is deciding whether or not to allocate more resources to the purchase of audio books for the college library. Explain why the college might want to use a stratified sample rather tha...

Q: Suppose a homeowner is considering replacing the grass in the front yard

Suppose a homeowner is considering replacing the grass in the front yard with drought-resistant plants such as cactus. She wants to find out whether the neighbors approve of this or not, so she inquir...

Q: A large concert promoter that operates several hundred concert locations around the

A large concert promoter that operates several hundred concert locations around the country wants to survey the managers at these locations to ask their opinions about how to improve attendance at con...

Q: A college administrator wants to determine whether the professors at the college

A college administrator wants to determine whether the professors at the college are doing a good job. Each professor teaches multiple classes, and so for each professor, one of his or her classes is...

Q: In 2017 the Pew Research Center published a report on the demographics

In 2017 the Pew Research Center published a report on the demographics of the U.S. military. The following table shows the ethnic breakdown of active-duty U.S. military services and the ethnic breakdo...

Q: The following table shows the average number of vehicles sold in the

The following table shows the average number of vehicles sold in the United States monthly (in millions) for the years 2001 through 2018. Data on all monthly vehicle sales for these years were obtaine...

Q: Mark Bates, a statistics professor at Oxnard College, recorded his

Mark Bates, a statistics professor at Oxnard College, recorded his commuting times using three different routes from home to work. The routes are named for the streets on which he traveled, and the ti...

Q: A researcher wants to determine whether the faculty-to-student

A researcher wants to determine whether the faculty-to-student ratio tends to be different in private colleges from that in public colleges. She has an almanac that lists this information for all accr...

Q: A statistics instructor randomly selected four bags of oranges, each bag

A statistics instructor randomly selected four bags of oranges, each bag labeled 10 pounds, and weighed the bags. They weighed 10.2, 10.5, 10.3, and 10.3 pounds. Assume that the distribution of weight...