Exam 8: Correlation and Linear Regression

In the equation y = a + b(x), x represents the value of the dependent variable.

The regression coefficient is also known as the ______.

The formula y = a + b(x) represents the ______.

A researcher wants to estimate voter turnout for different regions of the country. She divides the country into four regions. How many dummy variables will she have in the equation?

In the equation y = a + b(x), b stands for the ______.

A researcher is studying her students' test scores and the amount of coffee (number of cups) consumed before the exam. In the equation y = a + b(x) which variable represents the test scores?

Pearson's r is used to gauge the strength of a relationship between two interval-level variables when performing correlation analysis.

A researcher working with data about individuals' ages and their income wants to know how income is related to age. Does income go up or down or remain constant with age? Which analysis would help the researcher understand this relationship best?

The y-intercept is the value of y when x equals zero.

In the equation y = a + b(x) which variable represents the y-intercept?

Which of the following formalizes the intuitive judgment made about the direction and strength of a relationship?

Pearson's r is a proportional reduction in error (PRE) measure of association.

Regression reveals the direction of the relationship between an independent variable and a dependent variable.

Multiple regression analysis produces a ______ for each independent variable in the model.

A graphical display where the independent variable is measured along the horizontal axis and the dependent variable is measured along the vertical axis is called a ______.