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Chapter 4: Q. 4.133 (page 189)
The coefficient of determination of a set of data points is and the slope of the regression line is . Determine the linear correlation coefficient of the data.
The linear correlation coefficient
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Answer true or false to each statement, and explain your answers.
a. The graph of a linear equation slopes upward unless the slope is 0 .
b. The value of the y-intercept has no effect on the direction that the graph of a linear equation slopes.
To determine whether is positive, negative, or zero.
If tends to increase linearly as increases, the variables are------ linearly correlated.
Determine the linear correlation coefficient by formula and definition.
A measure of the amount of variation in the observed values of the response variable not explained by the regression is the----. The mathematical abbreviation for it is----.
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