### Study SummaryA crossover study was conducted to examine the effects of oat bran cereal on serum cholesterol levels in males with hypercholesterolemia. Fourteen participants were assigned randomly to a diet including either oat bran or corn flakes. After two weeks, their low-density lipoprotein (LDL) cholesterol levels were measured. Each participant then switched to the alternate diet, and LDL levels were measured again after another two-week period.#### LDL Cholesterol Levels (mmol/l)| Subject | Corn Flakes | Oat Bran ||---------|-------------|----------|| 1 | 4.61 | 3.84 || 2 | 6.42 | 5.57 || 3 | 5.40 | 5.85 || 4 | 4.54 | 4.80 || 5 | 3.98 | 3.68 || 6 | 3.82 | 2.96 || 7 | 5.01 | 4.41 || 8 | 4.34 | 3.72 || 9 | 3.80 | 3.49 || 10 | 4.56 | 3.84 || 11 | 5.35 | 5.26 || 12 | 3.89 | 3.73 || 13 | 2.25 | 1.84 || 14 | 4.24 | 4.14 |### Questions**(a)** Which of the following data collection methods would be most appropriate to obtain data on subjects’ cholesterol?- **(i)** Ask each subject what his/her cholesterol level is while on each diet.- **(ii)** Have a medically trained professional conduct a standard laboratory cholesterol measurement for each subject while they are on each diet.**Recommendation:** It is generally more reliable to have a medically trained professional measure cholesterol levels in a laboratory setting, as this ensures accurate and consistent data collection.**(b)** Are the two samples of data paired or independent?**Answer:** The samples are paired because each subject serves as their own control, experiencing both diets and providing related measurements under each condition.

Answered: Image /qna-images/answer/2a2250ec-77cd-49f0-9640-887848b89edf.jpg

Answered: 1. A crossover study was conducted to…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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An official of a large car manufacturing company wanted to study the relationship between an employee's age and the number of absences. For this, a random sample of 10 randomly selected employees was collected and the following data was obtained. The material: age 40 28 34 27 21 38 19 55 31 35 number of absences 1 6 6 9 12 4 13 2 5 3 (a) Predict the number of absenteeism for a 42-year-old employee.(b) Determine the 95% prediction interval for the number of absences for the employee in (a).
You’re interested in knowing if a walking plus strength training exercise program results in a significantly greater increase in maxVo2 as compared to a walking only or a strength training only exercise program. Participants are randomly selected and then randomly assigned to one of three groups— walking plus strength training, walking only, or strength training only. After 6-months of exercise the participants are assessed. Which statistical analyses was used?
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