Exam 12: Association Between Variables Measured at the Interval-Ratio Level

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?

Visual examination of a scatterplot indicates the existence of an association between variables when

After scores of all cases have been located on a scatterplot, a straight line drawn so that it comes as close as possible to touching every score is called the

According to the study of gender and housework cited in the text,

One important function of the least-squares regression equation is that

By convention, the dependent variable is arrayed along the ______________ in a scatterplot.

If the slope (b) is zero, the value of r

The explained variation represents

The coefficient of determination may be interpreted with a logic akin to

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

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

A study of traffic safety show a correlation of 0.57 between average speed of traffic and number of fatal accidents for a particular stretch of highway. This means that

If the slope of a regression line is 1.5, then

The slope (b) is an awkward measure of the strength of a relationship because

On a scatterplot, the regression line

If the regression line showing the effect of education on income has a slope of 1000,

One key assumption of correlation analysis is that the variables have an essentially __________ relationship.

If the regression line on a scatterplot slopes upward from left to right, the relationship is

The appropriate measure of association for situations in which both variables are interval-ratio in level of measurement is

By convention, the independent variable is arrayed along the ______________ in a scatterplot.