A which type of design is this randomized block

Info icon This preview shows pages 6–7. Sign up to view the full content.

View Full Document Right Arrow Icon
a. Which type of design is this? Randomized block design b. Identify the subjects, factor(s), levels, treatments, blocking variable, and the response (outcome) variable. Subjects: twenty overweight dogs Factor: weight loss program Levels: Treatments=A, B, C, D                                            6
Image of page 6

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Blocking variable: Amount overweight (in five groups) Response variable: amount of weight loss after 8 weeks on the program c. Is this a well-designed experiment in terms of the 3 criteria used in class? Why or why not? Makes comparisons: does a good job of that, including the blocking into groups according to how overweight they are Avoids bias: some issues here. How controlled are the dogs’ diets during the program? How much exercise will they get? Type of dog, age of dog, etc. Has enough data: 20 dogs is a low number, especially since 4 per treatment. But due to practical reasons this may be the best they can do. d. Why was it a good idea to break the dogs into groups according to how overweight they were? To avoid bias due to the amount each dog is overweight. If you do a simple random sample you might get all the most overweight dogs in one program, and all the least overweight dogs in another program. It might be easier for more overweight dogs to lose weight, regardless of the program they are in. e. Are there any confounding variables that have not been accounted for in this experiment? Explain. Yes; type of dog, age of dog, amount of exercise, etc.
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern