A variable that is irrelevant to the hypothesis being tested and can alter a researcher’s conclusions is called a(n) ____
a. confounding variable
b. independent variable
c. dependent variable
d. third variable
ANSWER:
a
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Equal variance across the two populations being compared can be tested when SPSS is used to conduct the______.
A. one-way ANOVA B. independent samples t-test C. pooled variance D. Levine's test
Children typically have a firm gender identity and have begun to act in accordance with well-established gender roles:
a. by the time they are in elementary school (ages 6 or 7) b. while they are still toddlers (age 1 or 2) c. during the early preschool years (ages 3 or 4) d. only once they reach adolescence (during the teen years)
Kyle plants a group of seeds in a pot of enriched soil and provides all the seeds with identical temperature, lighting, and water. When his plants are mature, he notices that they are quite different in height. Which of the following is the best conclusion Kyle could draw from his observations?
A. The differences in the height of his plants are due to equal contributions of environmental and genetic variables. B. Holding the plants' environment constant has magnified the influence of genetic differences on the height of the plants. C. Genetic variables are more influential than environmental variables in determining the height of Kyle's plants. D. Kyle lacks sufficient information to draw any scientific conclusions from his observations.
Infant's visual acuity is at best a distance of ____
a. 8–14 inches b. 24–44 inches c. 8–14 feet d. 24–44 feet