Mary is using a one-sample t-test on the following group: Subject...

Mary is using a one-sample t-test on the following group:

Subject #15: 7.5 hours
Subject #27: 6 hours
Subject #48: 7 hours
Subject #80: 6.5 hours
Subject #91: 7.5 hours
Subject #82: 8 hours
Subject #23: 5.5 hours

Select the two TRUE statements.