10.54 The average take-out order size for Ashoka Curry House ...

     10.54 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. Customer Order Size Statistic Friday Night   Saturday Night Mean order size . x1 = 22.32 . x2 = 25.56 Standard deviation   s1 = 4.35 s2 = 6.16 Number of orders n1 = 13 n2 = 18