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A student wants to test whether today’s graduating seniors are just as optimistic about their future...

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Statistics

A student wants to test whether today’s graduatingseniors are just as optimistic about their future prospects than inthe past. Data from a similar survey given 10 years ago to anational sample of graduating students resulted in a mean of 7.9. Arandom sample of 16 seniors is asked to evaluate the future jobmarked on a 10-point scale from 1 (dismal) to 10 (excellent). Thescores on the test are: 10, 6, 6, 8, 9, 7, 8, 6, 7, 8, 8, 7, 6, 9,5, 10.

(a) Set up your hypotheses using the correctnotation

(b) Compute tobt

(c) What is the statistical decision? JUSTIFY YOURANSWER

(d) What is the conclusion?

(e) Compute the 95% Confidence Interval forμ

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