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Question
38 A normal distributiona) has more than half of its data points to the left of the median.
b) has more than half of its data points to the right of the mean.
c) has 95% of its data points within one standard deviation of the mean.
d) is symmetrical.
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.
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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
j) Upper adjacent value
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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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12 The vertical line in the center of a box plot
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b) represents the sample median.
c) serves to anchor the box.
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Q:
10 What do we mean by an unbiased statistic?
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b) a statistic whose average is very stable from sample to sample
c) a statistic used to measure racial diversity
d) a statistic whose long range average is equal to the parameter it estimates
Q:
8+ When calculating the standard deviation we divide by N-1 rather than N because the result is
a) smaller.
b) less biased.
c) easier to interpret.
d) equal to the population mean.
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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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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b) it is best used with nominal scales.
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a) 3
b) 11
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a) median
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Q:
10 When we plot a histogram, the values on the X axis are
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Q:
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Q:
The previous graph is symmetrical.
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b) focus on the median and spread of the data.
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d) all of the above
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a) Name the independent variable.
b) Name the dependent variable.
c) Is the dependent variable discrete or continuous?
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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.