Mathematics, 31.03.2020 02:39, jfghj

A random sample of 40 college students has a mean earnings of $3120 over the summer months. Assume the population standard deviation of earnings over the summer months for college students is $677 and that the distribution of earnings over the summer months for college students is normally distributed. 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.

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A random sample of 40 college students has a mean earnings of $3120 over the summer months. Assume t...