A study investigated the effect of shelf placement on supermarket sales of Mello

Question

A study investigated the effect of shelf placement on supermarket sales of Mellow Moments, a brand of instant coffee. The study ran over a period of fourteen weekdays, and on a given day the coffee brand was shelved in one of three different heights: knee, waist, or eye level. The assignment of shelf position to day was at random. On each day, the sales of Mellow Moments (in $ 100) were recorded and were as follows: Knee Level 6.245.51 5.73 5.48 Waist Level 7.28 7.73 7.607.86 9.45 Eye Level 6.846.217.15 7.868.13 Box plots displaying the data are shown below: Daily Sales of Mellow Moments coffee by Supermarket Shelf Heigh Knee Waist Eye Shelf Height

Explanation / Answer

applying one way ANOVA on above:

part b)

c) common variance =MSE =0.513

d)

sample size mean std deviation knee 4 5.740 0.351 waist 5 7.984 0.847 eye 5 7.238 0.775

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