Most middle-aged adults have almost 70 waking hours per week at their disposal for leisure

To determine the dose-related effects of amphetamine on maze running, Dr. Symon randomly assigns his rats into four groups. The first group receives no amphetamine, the second group receives 0.5 mg/kg, the third group receives 1.0 mg/kg, and the fourth group receives 2 mg/kg. What initial statistical test should Dr. Symon use to examine the effects of the drug?

a. one-way repeated measures analysis of variance b. independent samples t-test c. two-way analysis of variance d. one-way analysis of variance

The research method that is often used to obtain information concerning individuals' behaviors, attitudes, and/or opinions is the

a. case study method. b. naturalistic observation method. c. correlation method. d. survey method.