Suppose that a group of 10 people join a weight loss program for 3 months. Each person’s weight is recorded at the beginning and at the end of the 3-month program. To test whether the weight loss program is effective, what test should be used?

To test whether the mean height of female college students is greater than 5.5 feet, what test should be used?

To test whether the mean height of female college students significantly differs from the mean height of male college students, what test should be used?

Options:

-A two (independent) sample t-test.

-A two-sample z-test.

-A one-sample t-test.

-A paired t-test.