An advertisement for a popular weight-loss clinic suggests that participants in its new diet program lose, on average, more than 10 pounds. a consumer activist decides to test the authenticity of the claim. she follows the progress of 18 women who recently joined the weight-reduction program. she calculates the mean weight loss of these participants as 10.8 pounds with a standard deviation of 2.4 pounds. which of the following are appropriate hypotheses to test the advertisement’s claim?