A study examined whether the mean daily minutes of exercise differed between transfer and non-transfer students. This is an example of a:

• One-sample test
• Paired test
• Independent samples test
• None of the above.

A study examined whether the anxiety scores of a group of college students differed before and after a series of "walk and talk" therapy sessions. This is an example of a:

• One-sample test
• Paired test
• Independent samples test
• None of the above

Suppose a researcher is interested in the effectiveness of a new therapy at reducing scores on the global depression scale (GDS). Assume that an effective change in the GDS scale between placebos and treatment groups must be more than 5 points. Which of the following correctly identifies the null and alternative hypotheses for the test for independent means?

• H0: 1 - 2 = 5, HA: 1 - 2 5
• H0: 1 - 2 > 5, HA: 1 - 2 5
• H0: 1 - 2 < 5, HA: 1 - 2 = 5
• H0: 1 - 2 = 5, HA: 1 - 2 > 5