For Exercises perform each of these steps. Assume that all variables are normally or approximately normally distributed.
a. State the hypotheses and identify the claim.
b. Find the critical value(s).
c. Compute the test value.
d. Make the decision.
e. Summarize the results.
Use the traditional method of hypothesis testing unless otherwise specified.

A researcher hypothesized that scores differed between the first and last rounds of major U.S. golf tournaments. Here are the paired data for randomly  selected golfers from the 2012 U.S. Open. At the 0.05 level of significance, is there a difference?

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Golfer Round 1 Round 2 1 2 72 73 72 69 69 3 4 5 6 72 72 72 70 75 7 8 73 70 76 75 73 75 74