Can Science Cure the Common Cold?
Chapter 1, Problem 9
A relationship between two factors, for instance, between outside temperature and the number of people with active colds in a population, is known as a(n) a. a. significant result; b. correlation; c. hypothesis; d. alternative hypothesis; e. experimental test
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Related Practice
Textbook Question
If I perform a hypothesis test in which I demonstrate that the prediction I made in question 5 is true, I have . a. proved the hypothesis; b. supported the hypothesis; c. not falsified the hypothesis; d. B and C are correct; e. A, B, and C are correct
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Textbook Question
Control subjects in an experiment .
a. should be similar in most ways to the experimental subjects;
b. should not know whether they are in the control or experimental group;
c. should have essentially the same interactions with the researchers as the experimental subjects;
d. help eliminate alternative hypotheses that could explain experimental results;
e. all of the above
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Textbook Question
An experiment in which neither the participants in the experiment nor the technicians collecting the data know which individuals are in the experimental group and which ones are in the control group is known as .
a. controlled;
b. biased;
c. double-blind;
d. falsifiable;
e. unpredictable
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Textbook Question
A primary source of scientific results is .
a. the news media;
b. anecdotes from others;
c. articles in peer-reviewed journals;
d. the Internet;
e. all of the above
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Textbook Question
A story on your local news station reports that eating a 1-ounce square of milk chocolate each day reduces the risk of heart disease in rats and that this result is statistically significant. This means that .
a. people who eat milk chocolate are healthier than those who do not;
b. the difference between chocolate-eating and chocolate-abstaining rats in heart disease rates was greater than expected by chance;
c. rats like milk chocolate;
d. milk chocolate reduces the risk of heart disease;
e. two ounces of milk chocolate per day is likely to be even better for heart health than 1 ounce
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Textbook Question
What features of the story on milk chocolate and heart health described in question 11 should cause you to consider the results less convincing?
a. The study was sponsored by a large milk chocolate manufacturer;
b. A total of 10 rats were used in the study;
c. The only difference between the rats was that human participants of the experimental group received chocolate along with their regular diets, and the human participants of the control group received no additional food;
d. The reporter notes that other studies indicate milk chocolate does not have a beneficial effect on heart health;
e. all of the above
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