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Question
30+ If the test scores on an art history exam were normally distributed with a mean of 76 and standard deviation of 6, we would expecta) most students scored around 70.
b) no one scored 100 on the exam.
c) almost equal numbers of students scored a 70 and an 82.
d) both a and c
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
Q:
57 Create two sets of scores with equal ranges, but different variances.
Q:
55 Based on the same data, calculate:
a) The median location
b) The median
c) The hinge location
d) The upper hinge
e) The lower hinge
f) H spread
g) Lower fence
h) Upper fence
i) Lower adjacent value
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Q:
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27+ Which of the following is NOT a method of describing data that reduces the role of outliers on the measurement of a data set's variability?
a) interquartile range
b) boxplot
c) range
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Q:
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:
8+ When calculating the standard deviation we divide by N-1 rather than N because the result is
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c) easier to interpret.
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Q:
44 Algebraically, the mean = (ï“X)2/N.
Q:
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.
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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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b) will tell us nothing about the children who do hear voices.
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Q:
18 is the symbol commonly used for the
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Q:
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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a) 3
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Q:
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Q:
10 When we plot a histogram, the values on the X axis are
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b) the midpoints
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Q:
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Q:
The previous graph is symmetrical.
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d) all of the above
Q:
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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.
Q:
43 A "variable" refers to data that is constant.