![]() ![]() It ranges from -1 to 1, where -1 indicates a perfect negative relationship, 1 indicates a perfect positive relationship, and 0 indicates no relationship. The correlation coefficient measures the strength and direction of the linear relationship between two variables. Step 5: Calculate the correlation between Age and NOx. ![]() In this case, we want to plot NOx on the y-axis and Age on the x-axis. Age.Ī scatter plot is a graphical representation of the relationship between two variables. Step 4: Construct a scatter plot of NOx vs. \[ \hat\)) from the actual values (y) for each data point. To calculate the least-squares line equation, we need to use the formula: Step 1: Calculate the least-squares line equation. Texts: Help with codes and language used. ![]() What are the mean, median, variance, and standard deviation of the NOx variable? Construct a boxplot and histogram of the NOx variable and elaborate on your findings.ħ. What is the correlation between Age and NOx?Ħ. What is the corresponding residual for the first data points 152, 73, 80, 75? What is the coefficient of multiple determination, r? Interpretation?ģ. What is the equation of the least-squares line, including all function coefficients?Ģ. ![]() If you are using R, no packages are needed). SOLVED: Texts: Help with codes and language used.Īnswer the following questions using your favorite program/software (1 hour). ![]()
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