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Question
30 In which of the following cases is it most useful to pool the variances?a) s12 = 7.3, N1 = 15 and s22 = 8.1, N2 = 15
b) s12 = 7.3, N1 = 15 and s22 = 52.3, N2 = 6
c) s12 = 8.4, N1 = 13 and s22 = 12.1, N2 = 19
d) none of the above
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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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
d) trimmed statistics
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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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Q:
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Q:
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Q:
44 Algebraically, the mean = (ï“X)2/N.
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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?
a) mean
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28 For the following data set [1, 9, 9, 9, 11, 28], which of the following is false?
a) The mode is 9.
b) The median is 9.
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Q:
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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d) it is the most commonly occurring score.
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a) 3
b) 11
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d) 6, 7, 9, and 11
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Q:
36 Multiple regression analysis yielded the following regression equation:
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Q:
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b) 10
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Q:
2+ Assume that we generated a prediction just by adding together the number of stressful events you report experiencing over the last month, the number of close friends you have, and your score on a measure assessing how much control you feel you have over events in your life (i.e., prediction = stress + friends + control). The regression coefficient for stressful events would be
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c) 0.0
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Q:
20+ When we think in terms of standardized data, the slope represents
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d) 0.
Q:
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Q:
17 In the equation = 12.6 X + 5
a) a difference of one unit in X will lead to a 5 point difference in the prediction.
b) will decrease as X increases.
c) the correlation is certain to be significant.
d) a difference of one unit in X will lead to a 12.6 point difference in the prediction.
Q:
13 The "best fitting line" is that regression line that
a) minimizes the errors of prediction.
b) minimizes each squared error of prediction.
c) minimizes the sum of squared errors of prediction.
d) hits the most points as it goes through the scatterplot.