•..Section II: Free Response Show all your work. Indicate clearlythe correctness of your methods as well as on the accuracy andAP2.22 A health worker is interested in determining ifomega-3 fish oil can help reduce cholesterol inadults. She obtains permission to examine thehealth records of 200 people in a large medicalclinic and classifies them according to whetheror not they take omega-3 fish oil. She also obtainstheir latest cholesterol readings and finds that themean cholesterol reading for those who are takingomega-3 fish oil is 18 points lower than the meanfor the group not taking omega-3 fish oil.AF(a) Is this an observational study or an experiment?Justify your answer.(b) Explain the concept of confounding in the contextof this study and give one example of a variablethat could be confounded with whether or notpeople take omega-3 fish oil.(c) Researchers find that the 18-point difference inthe mean cholesterol readings of the two groupsis statistically significant. Can they conclude thatomega-3 fish oil is the cause? Why or why not?

Introduction: The study involves 200 people in a large clinic, and consider whether these people…

Answered: AP2.22 A health worker is interested in…

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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Do you think the results of the study might be applicable to the whole population? Why or why not?
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According to data from the Tobacco Institute Testing Laboratory, a certain brand of cigarette contains an average of 1.4 milligrams of nicotine. An advocacy group questions this figure, and commissions an independent test to see if the the mean nicotine content is higher than the industry laboratory claims. The test involved randomly selecting n = 15 cigarettes, measuring the nicotine content (in milligrams) of each cigarette. The data is given below: 1.8, 1.8, 1.5, 1.1, 1.4, 1.3, 1.3, 1.4, 1.1, 1.3, 1.6, 1.2, 1.8, 1.4, 1.6; Download .csv file Not sure how to perform some of the tasks with R-Studio? Click to learn more (a) Do the data follow an approximately Normal distribution? Use alpha = 0.05. yes (b) Determine the P-value for this Normality test, to at least three decimal places. P (c) Choose the correct statistical hypotheses. O A. Ho: > 1.4, O B. Ho = 1.4, O C. Ho X = 1.4, O D. Ho: X = 1.4, ⒸE. Ho - 1.4 HA: > 1.4 OF. Ho: X > 1.4, HA: X < 1.4 HA: < 1.4 HA: 1.4 HA: X 1.4 HA: X <…
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