Questions from Business Statistics

Q: Suppose that the researchers who carried out the study described in the

Suppose that the researchers who carried out the study described in the previous exercise wanted to estimate the mean following distance with a margin of error of 0.2 meters. Using the given sample st...

Q: A study of fast-food intake is described in the paper

A study of fast-food intake is described in the paper “what people buy from fast-food restaurants” (Obesity [2009]:1369–1374). Adult customers at three hamburger chains (McDonald’s, Burger King, and W...

Q: Medical research has shown that repeated wrist extension beyond 20 degrees increases

Medical research has shown that repeated wrist extension beyond 20 degrees increases the risk of wrist and hand injuries. Each of 24 students at Cornell University used a proposed new computer mouse d...

Q: A comprehensive study conducted by the National Institute of Child Health and

A comprehensive study conducted by the National Institute of Child Health and Human Development tracked more than 1000 children from an early age through elementary school (The New York Times, Novembe...

Q: Descriptions of four studies are given. In each of the studies

Descriptions of four studies are given. In each of the studies, the two populations of interest are the students at a particular university who live on campus and the students who live off campus. Whi...

Q: For each of the following hypothesis testing scenarios, indicate whether or

For each of the following hypothesis testing scenarios, indicate whether or not the appropriate hypothesis test would be about a difference in two population means. If not, explain why not. Scenario...

Q: Descriptions of four studies are given. In each of the studies

Descriptions of four studies are given. In each of the studies, the two populations of interest are female students at a particular university and male students at the university. Which of these studi...

Q: For each of the following hypothesis testing scenarios, indicate whether or

For each of the following hypothesis testing scenarios, indicate whether or not the appropriate hypothesis test would be for a difference in two population means. If not, explain why not. Scenario 1:...

Q: Many runners believe that listening to music while running enhances their performance

Many runners believe that listening to music while running enhances their performance. The authors of the paper “effects of Synchronous music on treadmill running among elite triathl...

Q: The study described in the previous exercise also measured time to exhaustion

The study described in the previous exercise also measured time to exhaustion for the 11 triathletes on a day when they listened to music that the runners had classified as neutral as compared to moti...