Questions from Business Statistics

Q: A company packaging snack foods maintains quality control by randomly selecting 10

A company packaging snack foods maintains quality control by randomly selecting 10 cases from each day production and weighing the bags. Then they open one bag from each case and inspect the contents....

Q: Dairy inspectors visit farms unannounced and take samples of the milk to

Dairy inspectors visit farms unannounced and take samples of the milk to test for contamination. If the milk is found to contain dirt, antibiotics, or other foreign matter, the milk will be destroyed...

Q: A local TV station conducted a PulsePoll about the upcoming mayoral election

A local TV station conducted a PulsePoll about the upcoming mayoral election. Evening news viewers were invited to text in their votes, with the results to be announced on the late-night news. Based o...

Q: Prior to the mayoral election discussed in Exercise 24, the newspaper

Prior to the mayoral election discussed in Exercise 24, the newspaper also conducted a poll. The paper surveyed a random sample of registered voters stratified by political party, age, sex, and area o...

Q: In a large city school system with 20 elementary schools, the

In a large city school system with 20 elementary schools, the school board is considering the adoption of a new policy that would require elementary students to pass a test in order to be promoted to...

Q: Let revisit the school system described in Exercise 26. Four new

Let revisit the school system described in Exercise 26. Four new sampling strategies have been proposed to help the PTA determine whether parents favor requiring elementary students to pass a test in...

Q: Students in the economics class discussed in Exercise 31 also wrote these

Students in the economics class discussed in Exercise 31 also wrote these conclusions. Explain the mistakes they made. 1. There was a very strong correlation of 1.22 between Life Expectancy and GDP. 2...

Q: For your political science class, you’d like to take a survey

For your political science class, you’d like to take a survey from a sample of all the Catholic church members in your city. A list of churches shows 17 Catholic churches within the city limits. Rathe...

Q: Some people have been complaining that the children playground at a municipal

Some people have been complaining that the children playground at a municipal park is too small and is in need of repair. Managers of the park decide to survey city residents to see if they believe th...

Q: An amusement park has opened a new roller coaster. It is

An amusement park has opened a new roller coaster. It is so popular that people are waiting for up to 3 hours for a 2-minute ride. Concerned about how patrons (who paid a large amount to enter the par...