don't worry about B I need A

For each question answer the following:

A. What is the right kind of statistical test for this experiment?

B. What is the specific null hypothesis for this experiment (as opposed to a generic null hypothesis for the test)?In the case of a multifactor ANOVA, there may be several null hypotheses.

(2points per question.)

1.As a biochemist working for a pharmaceutical company, your job is to test new drugs for possibleeffects, both detrimental and beneficial. The chemistry of agent TFK-05W suggests that it may have the effect of reducing the tendency toward obesity. The Zucker rat is an established genetic model for both obesity and hypertension. As rats of the obese strain age they gain weight much more rapidly than do the so-called "lean" Zucker strain. You plan to treat a group of 12 obese-strain animals with TFK-05W over a period of one year, and compare their average weight with that of a group of 12 obese-strain animals receiving a placebo over the same period of time.

Reference

Kurtz, T.W., R.C. Morris, and H. A.Pershadsingh (1989).The Zucker fatty rat as a genetic model of obesity and hypertension.Hypertension13:896-901.

Answer: A.t

B.

Platorchestia platensisat a beach on Block Island, Rhode Island.Photo 2016 by Aaron Hunt and used with permission.http://bugguide.net/node/view/1222812/bgimage

2.McDonald (1989) collected the amphipod crustaceanPlatorchestia platensison a beach near Stony Brook, Long Islandin April, 1987, removed and counted the number of eggs each female was carrying, then freeze-dried and weighed the mothers:

mass (mg)Eggs

5.3829

7.3623

6.1322

4.7520

8.1025

8.6225

6.3017

7.4424

7.2620

7.1727

7.7824

6.2321

5.4222

7.8722

5.2523

7.3735

8.0127

4.9223

7.0325

6.4524

5.0619

6.7221

7.0020

9.3933

6.4917

6.3421

6.1625

5.7422

Is the number of eggs produced by a mother related to the mother's mass?

Reference: McDonald, J.J. (1987). Repeated geographic variation at three enzyme loci in the amphipodPlatorchestia platensis.Evolution41(2):438-441.

Answer: A.

B.