Each statement contains a quantity. Rewrite each quantity using a power of 10.
A. There are about 37 trillion cells in an average human body.

B. The Milky Way contains about 300 billion stars.

C. A sharp knife is 23 millionths of a meter thick at its tip.

D. The wall of a certain cell in a plant is 4 nanometers thick. (A
nanometer is one billionth of a meter.)

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