Which of the following is associated with increased risk of contracting HIV?
A) Having fewer partners
B) Being circumcised
C) Having prior STIs
D) Having certain genetic factors
C
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Out of the 200–500 million sperm cells that are released during an ejaculation, only ____ complete the short journey up the Fallopian tubes to where an egg is waiting to be fertilized
a. half b. a few thousand c. a few hundred d. a few hundred thousand
When it comes to responding to stressful situations, some people are hardier than others. Those who are hardy tend to believe that . . .
a. They are blessed with a superior immune system b. Their activities are meaningful and important c. Stress is a sign of weakness d. All of the above
Which of the following is true about reliability?
A. Through statistical analyses, a test can be determined to be either reliable or not. B. A test does not need reliability if it has good face validity. C. If a test has reliability, it also has validity. D. A test's reliability is shown by how well the test items correlate with each other.
A variable that is truncated and has limited variability is said to have _____
a. directionality b. a third variable c. causality d. a restricted range