(Answered) A random sample of 25 with a mean of 80 and a standard

Statistics

A random sample of 25 with a mean of 80 and a standard deviation of 30 is taken from a population of 1000 that is normally distributed.

Find (a) the 90%, (b) the 95%, and

(d) How do these results compare with those in Prob. 4.15?

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