Of the descriptive statistics indicating variability, which is most affected by 1 extreme scores?

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

A researcher computed a correlation between height (mean = 62 inches, standard deviation =12) and weight (mean = 160 pounds, standard deviation =10) to be 0.5 (r=0.5).  Calculate the covariance between height and weight. 

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

A research had 5 cases (n=5) and used the data below to run a multiple regression with Y as the outcome variable and X1, X2, and X3. If Listwise was used to handle missing, how many cases would be in the analyses?

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

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?

A researcher conducts 2 regression studies examining different sets of variables.  In the first study b1 = .30, and in the second study  b1 = 1.4.  Which of the following statements is true?

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

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