According to the National Survey on Drug Use and Health, cigarettes (nicotine) are the most commonly used drugs in the United States
a. True
b. False
Indicate whether the statement is true or false
False
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What is the leading cause of death in the United States, taking more than 100,000 additional lives compared to the second leading cause?
a. cancer b. stroke c. homicide d. heart disease
If you conduct a study and predict that A causes B, then B is the ____
a. internal variable b. external variable c. independent variable d. dependent variable
As the sample size gets larger, what happens to the size of the correlation that is needed for significance?
a. It also gets larger. b. It gets smaller. c. It stays constant. d. There is no consistent relationship between sample size and the critical value for a significant correlation.
If a correlation coefficient that you expected to be fairly high, turns out to be very low, you should investigate whether there is a:
a. restrictive range on one or both variables. b. curvilinear relationship between the variables. c. third variable inhibiting the relationship. d. restrictive range on one or both variables and a curvilinear relationship between the variables.