MTH128 Chapter 9 Hyp test mean

1) It takes an average of 13 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will decline if the patient is immediately told the truth about the injury. The EMT randomly selected 58 injured patients to immediately tell the truth about the injury and noticed that they averaged 12.2 minutes for their blood to begin clotting after their injury. Their standard deviation was 2.6 minutes. What can be concluded at the the α = 0.05 level of significance? 2) Test the claim that the mean GPA of night students is significantly different than 3.3 at the 0.2 significance level.