Questions from Business Statistics

Q: To help travelers know what to expect, researchers collected the prices

To help travelers know what to expect, researchers collected the prices of commodities in 16 cities throughout the world. Here are boxplots comparing the average prices of a bottle of water, a dozen e...

Q: For each of these potential predictor variables, say whether they should

For each of these potential predictor variables, say whether they should be represented in a regression model by indicator variables. If so, then suggest what specific indicators should be used (that...

Q: Administrators at Texas A&M University were interested in estimating the

Administrators at Texas A&M University were interested in estimating the percentage of students who are the first in their family to go to college. The A&M student body has about 46,000 members. How m...

Q: The company plans to have the head of each corporate division hold

The company plans to have the head of each corporate division hold a meeting of their employees to ask whether they are happy on their jobs. They will ask people to raise their hands to indicate wheth...

Q: The university administration of Exercise 1 is considering a variety of ways

The university administration of Exercise 1 is considering a variety of ways to sample students for a survey. For each of these proposed survey designs, identify the problem. 1. Publish an advertiseme...

Q: The company of Exercise 2 is considering ways to survey their employees

The company of Exercise 2 is considering ways to survey their employees. For each of these proposed designs, identify the problem. 1. Leave a stack of surveys out in the employee cafeteria so people c...

Q: The managers of a large company wished to know the percentage of

The managers of a large company wished to know the percentage of employees who feel extremely satisfied to work there. The company has roughly 24,000 employees. They contacted a random sample of emplo...

Q: The president of the university plans a speech to an alumni group

The president of the university plans a speech to an alumni group. He plans to talk about the proportion of students who responded in the survey that they are the first in their family to attend colle...

Q: The company annual report states, Our survey shows that 87.

The company annual report states, Our survey shows that 87.34% of our employees are very happy working here. Comment on that claim. Use appropriate statistics terminology.

Q: A professor teaching a large lecture class of 350 students samples her

A professor teaching a large lecture class of 350 students samples her class by rolling a die. Then, starting with the row number on the die (1 to 6), she passes out a survey to every fourth row of th...