Questions from Business Statistics

Q: Refer back to the experiment in Exercise 22 . Instead of Total

Refer back to the experiment in Exercise 22 . Instead of Total counts, redo the analysis using log(Total counts) as the response. Do your conclusions change? How? Are the assumptions of the model bett...

Q: A student experiment was run to test the performance of 4 brands

A student experiment was run to test the performance of 4 brands of batteries under 2 different Environments (room temperature and cold). For each of the 8 treatments, 2 batteries of a particular bran...

Q: The U.S. Department of Labor (www.bls

The U.S. Department of Labor (www.bls.gov) collects data on the number of U.S. workers who are employed at or below the minimum wage. Here is a table showing the number of hourly workers by Age and Se...

Q: In an experiment on growing sweet peas, a team of students

In an experiment on growing sweet peas, a team of students selected 2 factors at 4 levels each and recorded Weight, Stem Length, and Root Length after 612 days of growth. They grew plants using variou...

Q: Another student analyzed the battery data from Exercise 25, using a

Another student analyzed the battery data from Exercise 25, using a one-way ANOVA. He considered the experimental factor to be an 8-level factor consisting of the 8 possible combinations of Brand and...

Q: Another student performs a one-way ANOVA on the container data

Another student performs a one-way ANOVA on the container data of Exercise 20 , using the 4 treatments water room, water outside, coffee room, and coffee outside. Perform this analysis and comment on...

Q: In the previous chapter we saw a two-factor experiment to

In the previous chapter we saw a two-factor experiment to test how microwave power and temperature affect popping. She chooses 3 levels of Power (low, medium, and high) and 3 Times (3 minutes, 4 minut...

Q: In Chapter 25 we saw a student experiment to study the effect

In Chapter 25 we saw a student experiment to study the effect of Tire Pressure and Acceleration on gas mileage. He devises a system so that his Jeep Wagoneer uses gasoline from a one-liter container....

Q: Refer to the experiment in Exercise 7 . After collecting her data

Refer to the experiment in Exercise 7 . After collecting her data and analyzing the results, the student reports that the F-ratio for Power is 13.56 and the F-ratio for Time is 9.36. 1. What are the P...

Q: The following table shows the reasons given by people 16 years of

The following table shows the reasons given by people 16 years of age and older in the United States who are not in the labor force for not working in early 2015. Counts are in thousands of people. (b...