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Mathematics, 05.05.2020 05:46, girlhooper4life11
An article in the Journal of Sound and Vibration describes a study investigating the relationship between noise exposure and hypertension. The following data are representative of those reported in the article.
y 1 0 1 2 5 1 4 6 2 3
x 60 63 65 70 70 70 80 90 80 80
y 5 4 6 8 4 5 7 9 7 6
x 85 89 90 90 90 90 94 100 100 100
a. Draw a scatter diagram of y (blood pressure rise in millimeters 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 σ2σ2.
c. Find the predicted mean rise in blood pressure level associated with a sound pressure level of 85 decibels.
d. Find the Coefficient of correlation.
e. Set up an ANOVA table and test for the slope of the regression line.
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Answers: 2
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