h the background music tempo was slow, the mean amount of bar purchases for a sample of 20 restaurant patrons was $30.41 a standard deviation of $15.90. When the background music tempo was fast, the mean amount of bar purchases for a sample of trons in the same restaurant was $21.32 with a standard deviation of $9.90. ming equal variances, at a = 0.01, is the true mean higher when the music is slow? Let sample 1 represent the slow tempo and le 2 represent the fast tempo. Choose the appropriate hypotheses. H -230 vs. H2: Hz - Pz> 0. Reject Hg if tcale > 2.445 H -H2s0 vs. Hy: Hi – P2> 0. Reject Hg if tcale < 2.445 - H2 = 0 vs. Hy: Hz- H2< 0. Reject Hg if teale <-2.445 M1 - Hz =O vs. H: Pi – P2< 0. Reject Hg if teale> -2.445 Oa Ob Oc Od

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