A state health department conducted an experiment to evaluate the reliability of assessing the…

A state health department conducted an experiment to evaluate the reliability of assessing the level of contamination of e. coli in three food sources, meat, fruit, and vegetables. There are four unique methods for assessing e. coli—M1, M2, M3, and M4—and hundreds of laboratories that use one or more of theses methods in the United States. For each of the methods of assessment, five laboratories are randomly selected to participate in the study. Forty containers are prepared for each food source by spiking the container with a known level of contamination of e. coli and then placing the container in a controlled climate for 3 weeks to allow the e. coli level to stabilize. Six containers, two of each of the three food sources, are then sent to each of the 20 laboratories selected for the study. The e. coli level (cfu/g), Yijkl, determined by the kth lab using assessment method j for the lth container of food source i is recorded for each of the 120 containers. The health department wants to compare the mean e. coli levels of the four assessment methods and their differences across the food sources. It also wants to determine if there are major differences in the mean e. coli determinations across the many laboratories in the United States.

 a. Write a model that displays an appropriate relationship between a level of contamination, Yijkl, and its possible sources of variation. Include any restrictions on the parameters in your model and any distributional properties of the random variables in your model.

b. Do the necessary conditions for testing hypotheses and constructing confidence intervals appear to be satisfied? Justify your answers.

c. Construct an ANOVA table for this experiment. Make sure to include expected mean squares and the p-values for the F tests.

d. At the   .05 level, which main effects and interaction effects are significant? Justify your answer by including the relevant p-values.

e. What are your overall conclusions about the differences in the four assessment methods?

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more
error: Content is protected !!