Sample Problem An article in the Journal of Soundand Vibration (1991, Vol. 151, pp. 383-394) described astudy investigating the relationshipbetween noise exposure and hypertension.The following data are 5 representative of those reported in the article.x represents the sound pressure levelin decibels andy represents the blood pressure rise in milli meters of mercurya. Drawa scatter diagram of y (blood pressure rise in milli meters of mercury) versusx (sound pressure levelin decibels).b. Fit the simple linear regression model using least squares.c. Find an estimate of the variance o 2d. Find the predicted mean rise in blood pressure levelassociated with a sound pressure level of 85 decibelse. Calculate the coefficient of determination for this modeland provide an interpretation.60636570 | 70 | 70| 809080 | 80y115146.85 89 | 90 9090 90 | 94 | 100100100y46.849.76.

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Answered: Sample Problem An article in the…

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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eat out or in The overall change in the consumer price index is a weighted average of changes in various categories. on november 19, 2011 the boston globe reported the data displayed in figure 5.7. the change in the CPI for food is a weighted average of the change in the cost of food at home and the change in the cost of food away from home. find the weights.
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HypertensionA hypertensive patient has been on antihypertensive medication for several years. Her physician wants to monitor herblood pressure via weekly measurements taken at home.Each week for 6 weeks she takes several blood pressurereadings and averages the readings to get a summary bloodpressure for the week. The diastolic blood pressure (DBP)results are shown in Table 6.15.Table 6.15 Weekly mean DBP readingsfor an individual patientWeek Mean DBP Mean DBP (mm Hg) Week (mm Hg)1 89 4 842 88 5 823 81 6 89.5Mean 85.75sd 3.66 6.106 What is the probability that the sample mean will bewithin 1 unit of the population mean?6.107 Suppose we want to choose a large enough sampleso that the sample mean is within 1 unit of the populationmean 99% of the time. What is the minimum sample size toachieve this goal? Suppose the incidence rate of myocardial infarction (MI)was 5 per 1000 among 45- to 54-year-old men in 2000.To look at changes in incidence over time, 5000 men in thisage group were…

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