Question 1
The interquartile range is used as a measure of variability to overcome what difficulty of the range?
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the sum of the range variances is zero
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the range is difficult to compute
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the range is influenced too much by extreme values
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the range is negative
Question 2
The mean of a sample having the values of -2, 1, and 1 is
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zero
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1
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2
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3