Earl is at Stereo Warehouse looking for some new speakers for his ground-floor apartment
He would like speakers that produce the full range of sound the human ear can typically hear, but doesn't want to pay extra for speakers that also produce sounds only a dog can hear. What range of frequencies should he look for?
a) 10 to 1,000 hz
b) 10 to 10,000 hz
c) 20 to 20,000 hz
d) 200 to 2,000 hz
c
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Research shows that myelination
a. may continue into early adulthood and beyond. b. is complete by the time the child is born. c. is enhanced by vitamin B intake. d. enhances cognitive functioning, but not motor functioning.
In order to estimate the average (mean) weight of all professional football players, an investigator determines the weight of the "Dallas Cowboy" players. The average (mean) weight of all professional football players is called a _________
a. population c. sample b. parameter d. statistic
When it comes to decreasing obesity, the research most supports which idea
a. changing schools food and beverage offerings. b. putting parents in charge of deciding how to help their children lose weight. c. the importance of addressing cultural values about foods. d. taxing unhealthy foods.
Researchers would like for power to be at least
A. .80 B. .50 C. 2.5 D. 3.0