Cash withdrawals from a college credit union for a random sample of 30 Fridays and 30 Mondays are shown. At 5 .01, is there a difference in the mean withdrawal on Monday and Friday?
(a) Make stacked dot plots of the data (a sketch is OK).
(b) State the hypotheses.
(c) State the decision rule and sketch it.
(d) Find the test statistic.
(e) Make a decision.
(f) Find the p-value and interpret it.

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Randomly Chosen Cash Withdrawals (S) Friday Monday 10 370 10 30 70 20 50 20 30 20 40 10 10 250 20 110 10 10 20 20 10 30 10 10 400 10 10 20 70 100 20 30 200 20 10 30 20 100 20 20 20 20 10 20 20 100 20