Chapter 8 Flashcards
Multiple regression is both ______ and ______.
Linear; additive
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?
Y
In the equation y = a + b( x), x represents the value of the dependent variable.
False
Pearson’s r is used to gauge the strength of a relationship between two interval-level variables when performing correlation analysis.
True
Pearson’s r is a symmetrical measure of association between two variables.
True
If two variables are very closely related to one another they are said to have parsimony.
False
Correlation analysis produces a statistic that estimates the size of the effect of the independent variable on the dependent variable.
False
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 ______.
Scatter Plot
The y-intercept is the value of y when x equals zero.
True
In the equation y = a + b( x) which variable represents the y-intercept?
a
A researcher conducting a study of turnout in the fifty states finds a regression coefficient of .35. This tells the researcher that ______.
Turnout increases by .35 for each one unit increase in the independent variable
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?
3
A bivariate analysis is used to analyze the relationship between a(n) ______.
CorrectC. interval-level dependent variable and any independent variable at any level
Researchers typically use correlation analysis during the early stages of the research process.
True
In the equation y = a + b( x), b stands for the ______.
Regression coefficient
