Suppose a study is conducted to determine the effect of physical exercise on the level of low-density lipoprotein (LDL) cholesterol. The following data are on the amount of weekly exercise and LDL are collected: a. Plot an appropriate graph for the data. b. Compute the sample correlation coefficient. Interpret the correlation coefficient. Test the hypothesis whether the correlation is significant at 0.05. c. Write the regression equation. Interpret the equation. d. Predict the LDL who exercise 3 hours per week. e. Test at the 5% significance level for slope? Would you suggest there is a strong enough association between the variables to conclude that physical exercise is beneficial for lowering LDL? f. Calculate the coefficient of determination and provide your interpretation.
Suppose a study is conducted to determine the effect of physical exercise on the level of low-density lipoprotein (LDL) cholesterol. The following data are on the amount of weekly exercise and LDL are collected: a. Plot an appropriate graph for the data. b. Compute the sample correlation coefficient. Interpret the correlation coefficient. Test the hypothesis whether the correlation is significant at 0.05. c. Write the regression equation. Interpret the equation. d. Predict the LDL who exercise 3 hours per week. e. Test at the 5% significance level for slope? Would you suggest there is a strong enough association between the variables to conclude that physical exercise is beneficial for lowering LDL? f. Calculate the coefficient of determination and provide your interpretation.
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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Suppose a study is conducted to determine the effect of physical exercise on the level of low-density lipoprotein (LDL) cholesterol. The following data are on the amount of weekly exercise and LDL are collected:
a. Plot an appropriate graph for the data.
b. Compute the sample correlation coefficient . Interpret the correlation coefficient.
Test the hypothesis whether the correlation is significant at 0.05.
c. Write the regression equation. Interpret the equation.
d. Predict the LDL who exercise 3 hours per week.
e. Test at the 5% significance level for slope? Would you suggest there is a strong enough association between the variables to conclude that physical exercise is beneficial for lowering LDL?
f. Calculate the coefficient of determination and provide your interpretation.
Transcribed Image Text:Exercise (hr) 3 1.5 0.5 4.2 2.5 2 4.75
1.75 3.25 2.25
LDL (mg/dl) 96 136.4 168.8 102.1 145 98.6 104.3 124.5 147.3 120.4 130.6
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