The data set which contains an outlier from the given answer choices is; Choice D; {16, 42, 45, 45, 46, 48}.
An outlier in a set of data values is a data value which differs significantly from other data points and hence, tends to affect the mean of such set of data values significantly.
On this note, choice D is the set of data values which contains an outlier.
Read more on outliers;
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