A Professor of Women's Studies Is Interested in Determining If

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A professor of women's studies is interested in determining if stress affects the menstrual cycle. Ten women are randomly sampled for an experiment and randomly divided into two groups. One of the groups is subjected to high stress for two months while the other lives in a relatively stress-free environment. The professor measures the menstrual cycle (in days) of each woman during the second month. The following data are obtained.

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Definitions:

Carboxyl Group

A functional group consisting of a carbon atom double-bonded to an oxygen atom and single-bonded to a hydroxyl group, denoted as -COOH in organic compounds.

Prostaglandins

A group of physiologically active lipid compounds having diverse hormone-like effects in animals, derived enzymatically from fatty acids.

Arachadonic Acid

A polyunsaturated omega-6 fatty acid important in the inflammation process and cellular signalling.

Chair Conformation

A stable, puckered conformation of six-membered rings that minimizes torsional strain.