Questions from Business Statistics

Q: A headline that appeared in Woman’s World stated “black currant oil

A headline that appeared in Woman’s World stated “black currant oil curbs hair Loss!” (Woman’s World, april 4, 2016). This claim was based on an experiment described in the paper “effect of a nutritio...

Q: In the experiment described in the article “Study points to benefits

In the experiment described in the article “Study points to benefits of Knee replacement Surgery over therapy alone” (The New York Times, October 21, 2015), adults who were considered candidates for k...

Q: Use the data given in the previous exercise to construct and interpret

Use the data given in the previous exercise to construct and interpret a 95% confidence interval estimate of the difference in the proportion experiencing pain relief for the surgery treatment and thi...

Q: The paper “passenger and cell phone conversations in Simulated Driving”

The paper “passenger and cell phone conversations in Simulated Driving” (Journal of Experimental Psychology: Applied [2008]: 392–400) describes an experiment that investigated if talking on a cell pho...

Q: Choice blindness is the term that psychologists use to describe a situation

Choice blindness is the term that psychologists use to describe a situation in which a person expresses a preference and then doesn’t notice when they receive something different than what they asked...

Q: The article “footwear, traction, and the risk of athletic

The article “footwear, traction, and the risk of athletic injury” (january 2016, www.lermagazine.com/article/footwear -traction-and-the-risk-of-athletic-injury, retrieved December 15, 2016) describes...

Q: Use the data given in the previous exercise to construct and interpret

Use the data given in the previous exercise to construct and interpret a 95% confidence interval estimate of the difference in the injury proportion for the traditional cleat treatment and the swivel...

Q: Some fundraisers believe that people are more likely to make a donation

Some fundraisers believe that people are more likely to make a donation if there is a relatively quick deadline given for making the donation. The paper “now or never! the effect of Deadlines on chari...

Q: In a study of a proposed approach for diabetes prevention, 339

In a study of a proposed approach for diabetes prevention, 339 people under the age of 20 who were thought to be at high risk of developing type I diabetes were assigned at random to one of two groups...

Q: The article “fish oil Staves off Schizophrenia” (USA TODAY

The article “fish oil Staves off Schizophrenia” (USA TODAY, february 2, 2010) describes a study in which 81 patients age 13 to 25 who were considered at risk for mental illness were randomly assigned...