Questions from Business Statistics

Q: The hula-hoop, a popular children toy in the 1950s

The hula-hoop, a popular children toy in the 1950s, has gained popularity as an exercise in recent years. But does it work? To answer this question, the American Council on Exercise conducted a study...

Q: Ian Walker, a psychologist at the University of Bath, wondered

Ian Walker, a psychologist at the University of Bath, wondered whether drivers treat bicycle riders differently when they wear helmets. He rigged his bicycle with an ultrasonic sensor that could measu...

Q: Some companies offer 401(k) retirement plans to employees,

Some companies offer 401(k) retirement plans to employees, permitting them to shift part of their before-tax salaries into investments such as mutual funds. Employers typically match 50% of the employ...

Q: Coffee stations in offices often just ask users to leave money in

Coffee stations in offices often just ask users to leave money in a tray to pay for their coffee, but many people cheat. Researchers at Newcastle University alternately taped two posters over the coff...

Q: In 2000, the Journal of the American Medical Association (JAMA

In 2000, the Journal of the American Medical Association (JAMA) published a study that examined pregnancies that resulted in the birth of twins. Births were classified as preterm with intervention (in...

Q: A study begun in 2011 examines the use of stem cells in

A study begun in 2011 examines the use of stem cells in treating two forms of blindness, Stargardt disease and dry age-related macular degeneration. Each of the 24 patients entered one of two separate...

Q: A look at 474 participants in the San Antonio Longitudinal Study of

A look at 474 participants in the San Antonio Longitudinal Study of Aging found that participants who drank two or more diet sodas a day experienced waist size increases six times greater than those o...

Q: The Cleveland Casting Plant is a large, highly automated producer of

The Cleveland Casting Plant is a large, highly automated producer of gray and nodular iron automotive castings for Ford Motor Company. The company is interested in keeping the pouring temperature of t...

Q: Because of the difficulty of weighing a bear in the woods,

Because of the difficulty of weighing a bear in the woods, researchers caught and measured 54 bears, recording their weight, neck size, length, and sex. They hoped to find a way to estimate weight fro...

Q: The State Education Department requires local school districts to keep these records

The State Education Department requires local school districts to keep these records on all students: age, race or ethnicity, days absent, current grade level, standardized test scores in reading and...