Janet, a competitor in cup stacking, has a sample stacking time mean of8.4

seconds from22

trials. Janet still claims that her average stacking time is7.7

seconds, and the high average can be attributed to chance. At the1%

significance level, does the data provide sufficient evidence to conclude that Janet's mean stacking time is greater than7.7

seconds? Given the sample data below, accept or reject the hypothesis.

• H
• 0
• :=7.7seconds
• H
• a
• :>7.7seconds
• z=0.56
• p=0.2877