Questions from Business Statistics

Q: People in a random sample of 236 students enrolled at a liberal

People in a random sample of 236 students enrolled at a liberal arts college were asked questions about how much sleep they get each night (“alcohol consumption, Sleep, and academic performance among...

Q: USA TODAY (October 14, 2016) reported that Americans spend

USA TODAY (October 14, 2016) reported that Americans spend 4.1 hours per weekday checking work e-mail. This was an estimate based on a survey of 1004 white-collar workers in the United States. a. Sup...

Q: An automobile manufacturer decides to carry out a fuel efficiency test to

An automobile manufacturer decides to carry out a fuel efficiency test to determine if it can advertise that one of its models achieves 30 mpg (miles per gallon). Six people each drive a car from Phoe...

Q: A student organization uses the proceeds from a soft drink vending machine

A student organization uses the proceeds from a soft drink vending machine to finance its activities. The price per can was $0.75 for a long time, and the mean daily revenue during that period was $75...

Q: A hot tub manufacturer advertises that a water temperature of 100°

A hot tub manufacturer advertises that a water temperature of 100°F can be achieved in 15 minutes or less. A random sample of 25 tubs is selected, and the time necessary to achieve a 100°F temperature...

Q: Consumer Reports published the following gas mileage values (Overall MPG)

Consumer Reports published the following gas mileage values (Overall MPG) for a sample of electric or plugin hybrid car models (www.consumerreports.org/cro/cars /new-cars/hybrids-evs/ratings-reliabili...

Q: The dodo was a species of flightless bird that lived on the

The dodo was a species of flightless bird that lived on the island of Mauritius in the Indian Ocean. The first record of human interaction with the dodo occurred in 1598, and within 100 years the dodo...

Q: Example 12.12 provided the following 21-time discrimination scores

Example 12.12 provided the following 21-time discrimination scores for male smokers who had abstained from smoking for 24 hours. a. What characteristic of the sample size indicates that the methods b...

Q: Teams in the National Football League (NFL) are given a

Teams in the National Football League (NFL) are given a “bye” during one week of the season, when they can rest and not play a game. This may provide an advantage f...

Q: Consumer Reports provides ratings for televisions, including energy cost per year

Consumer Reports provides ratings for televisions, including energy cost per year (in dollars) (www.consumerreports.org/products/lcd-led-oled-tvs/ratings-overview/, retrieved December 23, 2016). Energ...