1.Calculating the variance (s2) involves _______ deviations because________. a.S
ID: 3352101 • Letter: 1
Question
1.Calculating the variance (s2) involves _______ deviations because________.
a.Subtracting; deviations are always positive.
b.Multiplying; samples are smaller than populations.
c.Dividing; distributions are sometimes skewed (asymmetric).
d.Squaring; the sum of unsquared deviations is equal to 0.
2.
What is an advantage of calculating the interquartile range instead of the range?
a.The interquartile range is based on all of the scores in the set of data.
b.The interquartile range is less affected by outliers than the range.
c.The interquartile range removes the highest 25% of the distribution.
d.The mean is used in the calculation of the interquartile range
3.The mean is described as the 'balancing point' for a set of scores because
a.The sum of the deviations of scores from the mean ((X - )) is equal to zero.
b.The mean is always the most frequency occurring score for a variable.
c.The sum of the squared deviations of scores from the mean ((X - )2) is equal to zero.
d.50% of the scores lie above the mean and 50% lie below the mean.
a.Subtracting; deviations are always positive.
b.Multiplying; samples are smaller than populations.
c.Dividing; distributions are sometimes skewed (asymmetric).
d.Squaring; the sum of unsquared deviations is equal to 0.
2.
What is an advantage of calculating the interquartile range instead of the range?
a.The interquartile range is based on all of the scores in the set of data.
b.The interquartile range is less affected by outliers than the range.
c.The interquartile range removes the highest 25% of the distribution.
d.The mean is used in the calculation of the interquartile range
3.The mean is described as the 'balancing point' for a set of scores because
a.The sum of the deviations of scores from the mean ((X - )) is equal to zero.
b.The mean is always the most frequency occurring score for a variable.
c.The sum of the squared deviations of scores from the mean ((X - )2) is equal to zero.
d.50% of the scores lie above the mean and 50% lie below the mean.
Explanation / Answer
1. Calculating the variance (s2) involves squaring deviations because the sum of unsquared deviations is equal to 0.
Option D is correct.
2. The interquartile range is less affected by outliers than the range.
Option B is correct.
3. The sum of the deviations of scores from the mean ((X - )) is equal to zero.
Option A is correct.
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