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Which statements are true?
A. An observation is influential for a statistical calculation if removing
it would markedly not change the result of the calculation.
B. An observation is influential for a statistical calculation if removing
it would markedly change the result of the calculation.
C. You can describe a scatterplot by its over all form, pattern, strength and number of
outliers.
D. All of the above are true.
E. None of the above is true.