Question Medical researchers have developed a new artificial heart constructed primarily of titanium and plastic. The heart will last and operate almost indefinitely once it is implanted in the patient's body, but the battery pack needs to be recharged about every four hours. A random sample of 35 battery packs is selected and subjected to a life test. The average life of these batteries is 4.05 hours. Assume that battery life is nommally distributed with standard deviation of 1 hour. Is there evidence to support the claim that mean battery life exceeds 4 hours? Use a= 0.05

Question ONE: 110 Marks! |S.0. 6f LL.0. a1,bll,bl4,cl,c5,c14| Medical researchers have developed a new articial heart constructed primarily of titanium and plastic. The heart will last and operate almost indeniter once it is implanted in the patient's body, but the battery pack needs to be recharged about every four hours. A random sample of 35 battery packs is selected and subjected to a life test. The average life of these batteries is 4.05 hours. Assume that battery life is normally distributed with standard deviation of 1 hour. Is there evidence to support the claim that mean battery life exceeds 4 hours? Use u= 0.05 Answer the following questions FROM 1 TO 8. Note: Show all calculations 1. What should be the H1 assumption? a. H1: in = 4 b. H1: in > 4 c. H1: in 72 4 (1. H1: u