A random sample of 40 college students has a mean earnings of $3120 with a standard deviation of $677 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.
A)Use normal distribution.
B)Use the t-distribution.
C)Cannot use normal distribution or t-distribution.

Question

Quizplus · Accepted Answer

The sample size is greater than 30, so the normal distribution can be used.

A Random Sample of 40 College Students Has a Mean