Information for Question 33: A component of cholesterol called high-density lipoprotein (HDL) is known as 'good cholesterol' because high levels of HDL are thought to lower the risk of coronary heart disease. It is believed that runners have increased HDL levels. The data below give details of an HDL study comparing male runners with a control group of male non-runners. At the 5% level of significance, test the claim that male runners have a higher mean HDL level than male non- runners. Runners Non-runners N = 40 N=45 Mean = 56 Mean = 49 st.dev. = 12.1 st.dev. = 10.0 Conduct the hypothesis test and state your conclusion. O a. p = 0.0025. Male runners do have a higher level of HDL cholesterol than non runners. O b. p = 0.0025. Male runners do not have a higher level of HDL cholesterol than non runners. O c. p = 0.0051. Male runners do not have a higher level of HDL cholesterol than non runners. O d. p = 0.0051. Male runners do have a higher level of HDL cholesterol than non runners