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)?

A researcher was interested in examining the effects of the amount of caffeine intake during the day on the quality of participants’ sleep quality of 50 male, sophomores at USF who were randomly selected. Quality of sleep was measured using an actigraphy and amount of caffeine was measured using a self-reported food diary. Is the sample used in the study a probability sample or a non-probability sample?

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

What is a meta-analysis?

If the researcher evaluated the measurement quality of the actigraphy by correlating the scores from the actigraphy (score range = 0 to 100 with higher scores representing higher quality) to the scores from the polysomnography (score range = 1.5 to 8.5 with higher scores representing higher quality), the gold standard used to measure sleep quality, what type of measurement evidence is this?