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Answer: The tails of the empirical distribution are heavier than those of the reference distribution if the QQ plot has a steeper slope at its tails.
A is correct. If the empirical distribution has heavier tails than the reference distribution, the QQ plot will have steeper slopes at its tails. Conversely, if the empirical distribution has lighter tails than the reference distribution, the QQ plot will have flatter slopes at its tails.
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A
The tails of the empirical distribution are heavier than those of the reference distribution if the QQ plot has a steeper slope at its tails.
B
QQ plots are used to smooth the empirical distribution by removing outliers through the use of quantiles.
C
A distribution is considered a good reference distribution if data drawn from it produces a QQ plot that is non-linear in the central mass of the distribution.
D
The primary purpose of a QQ plot is to measure the skewness and kurtosis of the empirical data.
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