Question

background music affect the behavior of supermarket shoppers? An Does to answer this question was conducted in a supermarket during the re shopping months. Two d experiment designed latively stable summer as randomly assigned to ays were selected in midweek. One day w receive no background music. During the second day, slow-tempo background music was played. The daily sales (in dollars) for 12 weeks are shown in the accompanying table. Use the Minitab printout to answer the following questions. Week 12 S14.172 15,485 13,922 12.204 15,501 15,106 14.608 13,946 15,002 14,670 16,202 13,286 15,917 16.110 13,818 14,709 13,982 16,416 14,727 14,823 14,825 15,949 15,488 14,955 Paired T for None Slow Mean StDev SE Mean None slow Difference 12 12 14509 15143 -635 1088 833 1154 314 240 90%CI for mean difference: (-1233, -36) T-Test of mean difference 0 (vs not 0) T-Value 1.90 P-Value 0.0 83 Do the data provide sufficient evidence when no background music was played versus days when slow-tempo music was played? a to indicate a difference in mean daily sales for days Test using Find a 90% confidence interval for the difference in mean daily sales for no-music days versus slow-tempo days a .10 b

Answer 1

Answer:

a).

calculated t= -1.90, P=0.083 which is < 0.10 level of significance. Ho is rejected.

There is sufficient evidence to indicate a difference in mean daily sales when no background music was played versus days when slow tempo music was played.

b).

90% CI for mean difference = ( -1233, -36).