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A random sample of 15 statistics textbooks has a mean price of $105 with a standard deviation of $30.

A random sample of 15 statistics textbooks has a mean price of $105 with a standard
deviation of $30.25. Determine whether a normal distribution or a t-distribution should
be used or whether neither of these can be used to construct a confidence interval.
Assume the distribution of prices is skewed left.

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