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It is inappropriate to use the mean to analyze data that are not at least interval level in measurement.

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True False

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True

Average deviation is a common measure of the variability of data containing a set of numbers.

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True False

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False

The most frequently occurring value in a set of data is called the mode.

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True False

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True

If the mean of a distribution is greater than the median, then the distribution is positively skewed.

True False

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A histogram can be used in business analytics to determine if a variable is approximately normally distributed.

True False

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The sum of deviations about the arithmetic mean for a given set of data is always equal to zero.

True False

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The average of the squared deviations about the arithmetic mean is called the variance.

True False

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Statistical measures used to yield information about the center or the middle parts of a group of numbers are called the measures of central tendency.

True False

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A box and whisker plot is determined from the mean, the smallest and the largest values, and the lower and upper quartile.

True False

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The sample standard deviation is calculated by taking the square root of the population standard deviation.

True False

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If the median of a distribution is greater than mean, then the distribution is skewed to the left.

True False

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A nonzero value of the skewness indicates asymmetry of the distribution of the data.

True False

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If the mean, median, and mode are equal, then the distribution is positively skewed.

True False

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Skewness and kurtosis of a data set are measures of the shape of the distribution.

True False

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The most appropriate measure of central tendency for nominal-level data is the median.

True False

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