Please, answers 9- 12. Thanks. 9. Some claim that magnets can be used to reduce

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Please, answers 9- 12. Thanks.

9. Some claim that magnets can be used to reduce pain. You are required to design a double-blind experiment to test this claim. Identify the appropriate double-blind design for the given study Randomly assign the subjects to be treated with magnets or a placebo. The subjects are informed about the object they are treated with and their responses in terms of pain relief are recorded. Randomly assign the subjects to be treated with magnets or a placebo. The subjects and researcher should be prevented from determining whether the subjects are being treated with a magnet or a placebo an measure their responses in terms of pain relief Consider only those subjects that want to be treated with a magnet and measure their responses in terms of pain relief 10. Vitamin D is needed for the body to use calcium. An experiment is designed to see the effects of calcium and vitamin D supplements on the bones of first-year college students. The outcome measure is the total body mineral content (TBBMC), a measure of bone health. Three doses of calcium will be used: 0, 200, and 400 mg/day. The doses of vitamin D will be 0, 50, and 100 international units (IU) per day. The calcium and vitamin D will be given in a single tablet. All tablets including those with no calcium and no vitamin D will look identical. Subjects for the study will be 90 men and 90 women. Identify the correct factor(s) and the number of treatments for this experiment. O The factor is first-year college students. There are two treatments. The factors are calcium dose and vitamin D dose. There are six treatments. The factors are calcium dose and vitamin D dose. There are nine treatments. The factor is total body mineral content (TBBMC). There are nine treatments. 11. A coffee house wants to compare two new varieties of coffee. For this study, there are two experiments under consideration. In experiment 1, different customers evaluate each variety. In experiment 2, each customer evaluates both varieties of coffee. Experiment 1 Flip a coin for each customer to choose which variety (s)he will taste. To evaluate preferences, we would need to design some scale for customers to rate the coffee they tasted, and then compare the ratings Experiment 2 Flip a coin for each customer to choose which variety (s)he will taste first. Ask which of the two coffees (s)he preferred Which of the two given designs can be considered as the stronger design? Experiment 1 O Experiment 2 periment

Explanation / Answer

9) Option 2

10) The factors are calcium & vitamin D dose . there are 6 treatments

11) Experiment 1

12) Option 2

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