b. Can the researcher conclude that regular participation in aerobic exercise causes systolic blood pressure to be lower? Briefly explain. (5 pts) No, the researcher cannot conclude that regular Participation in aerobic excercise causes systolic blood pressure to be lower for the reason beings that this was an observational study and there was no control group, so, even if the results were significant, nothing 4. The salmon louse (Lepeophtheirus salmonis) is a parasite that lives on fish, most commonly on can be Pacific and Atlantic salmon. Its presence on wild Pacific salmon has supposedly increased since Concluded the introduction of farmed Atlantic salmon in some regions of the Pacific Northwest, causing some concern about transmission of diseases between hosts. Sample data was collected on whether salmon were infested with salmon lice in both wild and farmed salmon in the table below: Infested Not Infested |Total proportion Wild 22 836 858 Farmed 108 912 1020 Total 130 1748 1878 a. Are the variables in the problem quantitative, categorical, or one of each? (3 pts) The variables are one of each because the categories are i Infested Not infested. They are also quantitative Taken because of the values associated with the categories b. Give an estimate for the proportion of salmon that are infested in the farmed category using the correct notation. (4 pts) P= 0.11 ( rounded from 0.105) C . ) Calculate the standard error of the sample statistic in (b). (3 pts) 5 = 1020- 1 d . Using your answers to (b) and (c), calculate a 90% confidence interval for the true proportion of salmon that are infested in the farmed category. (6 pts) e. If the proportion of infested salmon in a sample is above 0.2, preventative measures are taken to slow infestation - should preventative measures be taken for the farmed population? Explain by interpreting the confidence interval in (d) in context. (6 pts)