The amount of daylight in a town can be modelled by the sinusoidal function d(t) = 4.37cos0.017t + 12.52 where d(t) represents the hours of daylight and t represents the number of days since June 20, 2012. June has 30 days, July has 31 days. How many hours of daylight should be expected on August 20, 2012?

Two researchers are attempting to create a new psychotherapy protocol that more reduces panic attacks. they believe that they have succeeded and are now in the clinical trial period of their protocol's development. they are working with several cohort groups, some of which have been through the new protocol, while others have done the standard protocol currently recommended. if these researchers are interested in evaluating the difference in the percentage of test subjects who successfully decreased their panic attacks in 2 months on the new protocol versus the percentage of test subjects who successfully decreased their panic attacks in 2 months with the traditional protocol, which of the following statistical tests would be most appropriate? a. analysis of variance (anova) b. correlation c. chi-square test d. paired t-test e. independent t-test