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Question
In an experiment aimed at evaluating the effect of a memory-enhancing drug on the recall of a previously learned response. Either the drug or a placebo was administered to different groups of rats before the memory test. There were three trials of the memory test, and the dependent variable was the time it took the animal to make the correct response.Why do we not need to use a multiple comparison procedure to compare the drug and control conditions?
a) The difference is obvious.
b) The difference is unimportant.
c) There are only two groups.
d) The test would not be appropriate unless we had at least four groups.
Answer
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Related questions
Q:
58 What happens to the standard deviation when a constant is added to each score? Use the following set of data, and a constant of 2 to illustrate your answer.
1 2 3 4
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55 Based on the same data, calculate:
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b) The median
c) The hinge location
d) The upper hinge
e) The lower hinge
f) H spread
g) Lower fence
h) Upper fence
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a) interquartile range
b) boxplot
c) range
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18+ People in the stock market refer to a measure called the "standard deviation," although it is calculated somewhat differently from the one discussed here. It is a good guess that this measure refers toa) the riskiness of the stock.b) the value of the stock.c) how much the stock price is likely to fluctuate.d) how much money you are likely to earn from buying that stock.
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15+ Data points at the extremes of the distribution have
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c) serves to anchor the box.
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35 Which of the following is probably most useful in studies in which extreme scores sometimes occur but have no real practical significance?
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28 For the following data set [1, 9, 9, 9, 11, 28], which of the following is false?
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21 Suppose a sample of children reported how many voices they heard in their heads on a particular day, and that hearing voices was a relatively uncommon experience. In this case the mode
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18 is the symbol commonly used for the
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13 The chief advantage of the median is that
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d) it is the most commonly occurring score.
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Q:
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Q:
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The previous graph is symmetrical.
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d) all of the above
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44 A researcher randomly assigned clients to two conditions (a wait-list control group and a hypnosis group) and measured their smoking reduction. Smoking reduction is an independent variable.
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43 A "variable" refers to data that is constant.