A researcher claims that the mean systolic blood pressure for women is lower than the mean systolic blood pressure for men.  He selects random samples of 500 women and 500 men. For the sample of women, the mean is 121 mm Hg with a standard deviation of 32 mm Hg, and for the sample of men, the mean is 124 mm Hg with a standard deviation of 30 mm Hg. If a hypothesis test is conducted for the researcher’s claim at the 0.10 level of significance, what type of error could be made?

A nutritionist claims that a low carbohydrate diet helps people to lose weight. To test her claim, she selects a random sample of her clients and provides them with a 4-week low carbohydrate diet plan. The weight of each participant is recorded before starting the diet plan and after completing the plan. Which of the following is an appropriate test for the nutritionist’s claim?

In a study of American men with prostate cancer, the size of each patient’s primary tumor, in square centimeters, was recorded. A random sample of 36 participants in this study was found to have a mean primary tumor size of 17.5 square centimeters and a standard deviation of 15.7 square centimeters. Construct and interpret a 99% confidence interval for the mean primary tumor size of American men with prostate cancer.

Sperm are produced in the _____ and stored in the _____.

Estrogen and progesterone are produced by the _____.

Which one of the following is NOT one of the secondary sex characteristics typical of males:

The penis contains spongy, erectile tissue that fills with _____, causing it to stiffen during sexual arousal.

Beginning at the ninth week of development, the embryo is referred to as a fetus.

Women of childbearing ago go through a cycle about _____ days that make it possible to become pregnant.

The usual PRF ranges from