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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?

Given the title of this article, what is the independent variable? The effect of a liquid nutrition supplement on body composition and physical functioning in elderly people

Based on the scatterplot, what would you estimate the correlation to be (give a specific number)?

Given the title of this article, what is the independent variable? Gender Differences in Exercise Habits

When a distribution is markedly skewed, the preferred measure of central tendency is the

What effect will increasing the sample size have on the standard error of the mean (sampling error)?

If you had a health score of 60 in a group with a mean health score of 80 and a standard deviation of 40, what would be your z-score?