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When the correlation between X and Y is zero, the slope of the regression line is

A researcher develops a prediction equation with their first sample of participants, and then uses that equation to predict scores in a second new sample of participants.  The researcher should expect the prediction errors to tend to

If a researcher plotted the residuals from a multiple regression analysis and the residuals looked like this (below), what would these results tell you about whether the data met the assumptions underlying multiple regression?

What scale of measurement is the variable: The number of days off-work for the 6 months after the end of the treatment?

Using the correlation matrix below, what is the correlation between Sprint5M and Body Fat?

In the table below explain what the p values at the bottom of the table are telling you.

Which of the following correlation coefficients represents the strongest linear relationship between two variables?

What is the difference between a correlation between 2 variables and the covariance between 2 variables?

A researcher developed a regression equation to predict muscular strength from fat mass (Fat) in undergraduate students, and then computed residuals from the equation.  Explain what a residual is from a regression equation. 

A researcher examined the stress levels of male and female undergraduate students. What type of variable is gender?