The average take-out order size for Ashoka Curry House restaurant is shown. Assuming equal variances, at α = .05, is there a significant difference in the order sizes?
(a) State the hypotheses.
(b) State the decision rule and sketch it.
(c) Find the test statistic.
(d) Make a decision.
(e) Use Excel to find the p-value and interpret it.

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Customer Order Size (dollars) Statistic Friday Night Saturday Night Mean order size Standard deviation Number of orders = 22.32 s, 4.35 ni-13 25.56 = 6.16 n18