Questions from Business Statistics

Q: The Princeton Review 2016 College Hopes and Worries Survey Report (www

The Princeton Review 2016 College Hopes and Worries Survey Report (www.princetonreview.com/cms-content/final_cohowo2016survrpt.pdf, retrieved May 6, 2017) reported that 31% of students applying to col...

Q: In a survey of 800 college students in the United States,

In a survey of 800 college students in the United States, 576 indicated that they believe that a student or faculty member on campus who uses language considered racist, sexist, homophobic, or offensi...

Q: It probably wouldn’t surprise you to know that Valentine’s Day means big

It probably wouldn’t surprise you to know that Valentine’s Day means big business for florists, jewelry stores, and restaurants. But did you know that it is also a big day for pet stores? In January 2...

Q: Suppose that a campus bookstore manager wants to know the proportion of

Suppose that a campus bookstore manager wants to know the proportion of students at the college who purchase some or all of their textbooks online. Two different people independently selected random s...

Q: For each of the following choices, explain which would result in

For each of the following choices, explain which would result in a narrower large-sample confidence interval for p: a. 95% confidence level or 99% confidence level b. n = 200 or n = 500

Q: Based on data from a survey of 1200 randomly selected Facebook users

Based on data from a survey of 1200 randomly selected Facebook users (USA TODAY, March 24, 2010), a 98% confidence interval for the proportion of all Facebook users who say it is OK to ignore a cowork...

Q: Appropriate use of the interval / requires a large

Appropriate use of the interval requires a large sample. For each of the following combinations of n and p ˆ, indicate whether the sample size is large enough for this interval to be appro...

Q: The formula used to calculate a large-sample confidence interval for

The formula used to calculate a large-sample confidence interval for p is What is the appropriate z critical value for each of the following confidence levels? a. 95% b. 98% c. 85%

Q: The USA Snapshot titled “Baby’s First Photo Reveal” (USA

The USA Snapshot titled “Baby’s First Photo Reveal” (USA TODAY, October 17, 2014) summarized data from a survey of 1001 mothers with children under the age of 2. The Snapshot includes the following st...

Q: For the situation described in the previous exercise, use the five

For the situation described in the previous exercise, use the five-step process for estimation problems (EMC3) to construct and interpret a 99% confidence interval for the proportion of mothers of chi...