Dance Revolution (DDR) affected the heart rate of overweight and nonoverweight adolescents
A group of 22 adolescents, 10 classified as overweight and 12 as not overweight,
played DDR for 12 minutes, during which time the researchers measured each participant’s heart
rate. Which statistical test should the researchers use to analyze their data?
11. A clinical researcher was interested in determining whether his interventions for depression
were effective in minimizing depression symptoms among his participants. To assess the
effectiveness of his treatment program, he administered a depression inventory prior to his
treatment and after his treatment. He hypothesized that depression scores would be lower at time
two compared to time one. He then compared the mean of the differences between the two
groups to a known standard and found that his treatment was effective. Which statistical test was
the researcher most likely to have used to test his hypothesis?