Ten adult males between the ages of 30 and 40 participated in a study to evaluate the effect of a specific health regimen involvingdiet and exercise on the blood cholesterol. Five were randomly selected to be a control group, and five others were assigned totake part in the regimen as the treatment group for a period of 6 months. The following data show the reduction in cholesterolexperienced for the time period for the 10 subjects:Control group: 7, 3, -4, 14, 2Treatment group: -6, 5, 9, 4, 4Compute the sample mean and standard deviation for Control Group.Select one:O A. 4.4, 44.3О В. 4.4, 6.66о С. 3.2, 5.54O D. 3.2, 30.7

Given information- We have given 10 adult males between the ages of 30 and 40 to participate in a…

Answered: Ten adult males between the ages of 30…

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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Solid fats are more likely to raise blood cholesterol levels than liquid fats. Suppose a nutritionist analyzed the percentage of saturated fat for a sample of 6 brands of stick margarine (solid fat) and for a sample of 6 brands of liquid margarine and obtained the following results: Stick = [25.4,25.3,25.7,25.6,26.7,25.8] Liquid= [16.9,16.7,17.5,17.2,17.3,16.6] We want to determine if there a significant difference in the average amount of saturated fat in solid and liquid fats. What is the test statistic? (assume the population data is normally distributed) a) t = 34.743 b) t = 34.243 c) z = 34.743 d) z = 34.243 e) t = 23.065
A pharmaceutical company tested the impact of four cholesterol-reducing medications (denoted A, B, C and D) on people at high risk of heart attack. For this clinical trial 20 volunteers with LDL (bad) cholesterol levels of 140 mg/dl were randomly assigned to one of the four medications. The subjects were instructed to take one tablet per day for a period of three months after which their LDL levels were again measured. Below are the amounts (in mg/dl) by which the LDL levels decreased after the three month trial. | Medication A | Medication B | Medication C Medication D 31 30 31 30 32 31.5 32 35 29 30.5 29.75 27 33 30.5 31.75 31 29 31.5 33 29 (a) Write an appropriate statistical model (to represent the responses using an appro- priate equation) to describe the above data. Describe all symbols/notations used in the model. (b) Estimate the (four) group means, overall mean, and error variance (²) from the data. (c) Do the data provide sufficient evidence to indicate that at least one of…
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An industrial psychologist hired by a leading accounting firm wanted to know if the average number of hours worked per week at the firm was significantly different from the national average of 52 hours for accountants. The industrial psychologist randomly sampled n=16 people from different divisions within the firm, and calculated the average number of hours they worked per week over a three-month period. The dependent variable in this study is the number of hours worked per week. The data he obtained were: 54, 48, 68, 53, 60, 45, 57, 62, 71, 60, 55, 63, 68, 64, 56, 60
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A pharmaceutical company tested the impact of four cholesterol-reducing medications (denoted A, B, C and D) on people at high risk of heart attack. For this clinical trial 20 volunteers with LDL (bad) cholesterol levels of 140 mg/dl were randomly assigned to one of the four medications. The subjects were instructed to take one tablet per day for a period of three months after which their LDL levels were again measured. Below are the amounts (in mg/dl) by which the LDL levels decreased after the three month trial. Medication A Medication B Medication C Medication D 29 31 30 31 30.5 30 32 31.5 30.5 32 31.75 35 31 29.75 27 33 29 31.5 33 29 (d) What assumptions are needed to make this test valid? (e) If a key assumption in (d) is not satisfied, test if the data provide sufficient ev- idence to indicate that at least one of the medications produces a mean reduc- tion in LDL cholesterol that is different from any of the other medications using a non-parametric method (show all working and…
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