dramaticvicky1154 dramaticvicky1154

27-12-2022
Mathematics

Answered

A. A random sample of 50 interns has a mean earnings of $6520 with a population standard deviation of $927 over the summer months. 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.
B. In a random sample of 50 designer outfits, the average cost was $350 with a standard deviation of $50. 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 weekly food expenses is normally shaped.

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