H0:Pattern of demand hasn’t changed H1 Pattern of demand has changed The critical value on 2 degrees of freedom at 5% SL= 5.991 Reject H0 and conclude that there has been a significant change in the pattern of demand. 20. µD H0 : = 0 µD H1 : > 0 (one tailed since it is hoped that the campaign would not decrease sales) Critical value of = 1:895 at 5% (one tailed on 7 degrees of freedom) t Differences are: A B C D E F G H 28 -25 40 100 60 -20 0 50 = 42.633 SD Standard = = 15.073 = 1.932 Since 1.932 is greater than 1.895 H0 can be rejected at 5%. Therefore it seems likely that the campaign has worked.
H0:Pattern of demand hasn’t changed H1 Pattern of demand has changed The critical value on 2 degrees of freedom at 5% SL= 5.991 Reject H0 and conclude that there has been a significant change in the pattern of demand. 20. H0 : µD = 0 H1 : µD > 0 (one tailed since it is hoped that the campaign would not decrease sales) Critical value of t = 1:895 at 5% (one tailed on 7 degrees of freedom) Differences are: A B C D E F G H 28 -25 40 100 60 -20 0 50 SD = 42.633 Standard = = 15.073 = 1.932 Since 1.932 is greater than 1.895 H0 can be rejected at 5%. Therefore it seems likely that the campaign has worked.
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