Exam 13: Association Between Variables Measured at the Interval Ratio Level

A study found that parenting classes were closely related to a child's performance in school. Each week of parenting classes taken by a child's parents raised their high school GPA by 0.23 points. With an intercept of 1.68, what could parents who attended 8 weeks of classes expect to see in their child's subsequent GPA?

The text reported information about the relationship between homicide and poverty. The sample used was________.

In regression analysis, the symbol "a" stands for________.

A researcher wants to measure the strength of the association between income (measured in dollars per year) and education (measured in number of years of formal schooling). Which of the following would be the most appropriate measure of association?

A researcher reports a Pearson r of .57 between gender (female = 0, males = 1) and involvement in juvenile delinquency. Which of the following is an appropriate interpretation?

If we calculate an r of .60, the proportion of the variation of Y that is explained by X is________.

Scatterplots give information about the _____________ of a relationship.

If a line is drawn through the conditional means of Y, the line will________.

In a scatterplot, the point of minimized variation for scores of Y for a given value of X (the independent variable) is________.

The amount of error in predicting Y that remains after X has been taken into account is________.

If we fail to reject the null hypothesis in a test of significance for a Pearson's r, we conclude that________.

If a regression line is parallel to the horizontal axis of the scattergram, the slope (b) will be________.

If a = 5 and b = 10, what would the value of Y be when X = 100?________.

When working with interval-ratio data, the optimal strategy for predicting Y while taking X into account would be to________.

If the slope (b) is zero, the value of r________.

In most correlation matrices, the diagonal line has a value of________.

When working with interval-ratio data, the optimal strategy for predicting Y while ignoring X will be to use the________.