Questions from Business Statistics

Q: The paper “Sleeping with Technology: Cognitive, Affective and Technology

The paper “Sleeping with Technology: Cognitive, Affective and Technology Usage Predictors of Sleep Problems Among College Students” (Sleep Health [2016]: 49–56) summarized data from a survey of a samp...

Q: The report “The 2016 Consumer Financial Literacy Survey” (The

The report “The 2016 Consumer Financial Literacy Survey” (The National Foundation for Credit Counseling, www .nfcc.org, retrieved October 28, 2016) summarized data from a representative sample of 1668...

Q: A car manufacturer is interested in learning about the proportion of people

A car manufacturer is interested in learning about the proportion of people purchasing one of its cars who plan to purchase another car of this brand in the future. A random sample of 400 of these peo...

Q: Consider taking a random sample from a population with p 5 0

Consider taking a random sample from a population with p 5 0.70. a. What is the standard error of p ˆ for random samples of size 100? b. Would the standard error of pˆ be smaller for samples of size...

Q: The report “Parents, Teens and Digital Monitoring” (Pew

The report “Parents, Teens and Digital Monitoring” (Pew Research Center, January 7, 2016, www.pewinternet .org/2016/01/07/parents-teens-and-digital-monitoring, retrieved May 5, 2017) reported that 61%...

Q: The use of the formula for margin of error requires a large

The use of the formula for margin of error requires a large sample. For each of the following combinations of n and pˆ, indicate whether the sample size is large enough for use of this formula to be a...

Q: The USA Snapshot titled “Big Bang Theory” (USA TODAY

The USA Snapshot titled “Big Bang Theory” (USA TODAY, October 14, 2016) summarized data from a sample of 1003 American parents of children age 6 to 11 years. It reported that 53% of these parents view...

Q: Suppose that 935 smokers each received a nicotine patch, which delivers

Suppose that 935 smokers each received a nicotine patch, which delivers nicotine to the bloodstream at a much slower rate than cigarettes do. Dosage was decreased to 0 over a 12-week period. Of these...

Q: USA TODAY reported that the proportion of Americans who prefer cheese on

USA TODAY reported that the proportion of Americans who prefer cheese on their burgers is 0.84 (USA TODAY, September 7, 2016). This estimate was based on a survey of a representative sample of 1000 ad...

Q: The article “Most Americans Don’t Understand the Cloud, But They

The article “Most Americans Don’t Understand the Cloud, But They Should” (foxbusiness.com, October 17, 2016, retrieved November 12, 2016) reported that in a sample of 1000 people, 22% said they have p...