An article in the Journal of Sound and Vibration (Vol. 151, 1991, pp. 383-394) described a study investigating the relat
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- An Article In The Journal Of Sound And Vibration Vol 151 1991 Pp 383 394 Described A Study Investigating The Relat 1 (63.44 KiB) Viewed 11 times
An article in the Journal of Sound and Vibration (Vol. 151, 1991, pp. 383-394) described a study investigating the relation- ship between noise exposure and hypertension. The following data are representative of those reported in the article. y X y 1 60 0 63 1 65 5 4 6 85 89 90 2 70 5 70 1 4 70 80 8 4 5 7 90 90 90 94 6 90 2 80 9 7 100 100 3 80 6 100 (a) Draw a scatter diagram of y (blood pressure rise in mil- limeters of mercury) versus x (sound pressure level in decibels). Does a simple linear regression model seem reasonable in this situation? (b) Fit the simple linear regression model using least squares. Find an estimate of o². (c) Find the predicted mean rise in blood pressure level associated with a sound pressure level of 85 decibels.