Questions from Business Statistics

Q: The paper “depression, body mass index, and chronic obstructive

The paper “depression, body mass index, and chronic obstructive pulmonary disease—A holistic Approach” (International Journal of COPD [2016]:239&a...

Q: The production of pups and their survival are the most significant factors

The production of pups and their survival are the most significant factors contributing to gray wolf population growth. The causes of early pup mortality are unknown and difficult to observe. The pups...

Q: The standard deviation of the errors, se, is an important

The standard deviation of the errors, se, is an important part of the linear regression model. a. What is the relationship between the value of se and the value of the test statistic in a test of a h...

Q: A journalist is reporting about some research on appropriate amounts of sleep

A journalist is reporting about some research on appropriate amounts of sleep for people 9 to 19 years of age. In that research, a linear regression model is used to describe the relationship between...

Q: A nursing student has completed his final project, and is preparing

A nursing student has completed his final project, and is preparing for a meeting with his project advisor. The subject of his project was the relationship between systolic blood pressure (SBP) and bo...

Q: Consider the accompanying data on x = research and development expenditure (

Consider the accompanying data on x = research and development expenditure (thousands of dollars) and y = growth rate (% per year) for eight different industries. a. Would a simple linear regression...

Q: The paper “the effects of Split Keyboard geometry on upper body

The paper “the effects of Split Keyboard geometry on upper body postures” (ergonomics [2009]: 104–111) describes a study to determine the effects...

Q: Do taller adults make more money? The authors of the paper

Do taller adults make more money? The authors of the paper “Stature and Status: height, Ability, and labor market outcomes” (Journal of Political Economics [2008]: 499–532) investigated the associatio...

Q: Acrylamide is a chemical that is sometimes found in cooked starchy foods

Acrylamide is a chemical that is sometimes found in cooked starchy foods and which is thought to increase the risk of certain kinds of cancer. The paper “A Statistical regression mod...

Q: Consider a test of hypotheses about, b the population slope in

Consider a test of hypotheses about, b the population slope in a linear regression model. a. If you reject the null hypothesis, b = 0, what does this mean in terms of a linear relationship between x...