An experiment was conducted seeing whether senior citizens t…

An experiment was conducted seeing whether senior citizens taking fish oil supplements had lower levels of inflammation on average than those not taking the supplement. In the experiment, the 36 senior citizens in the group taking the oil had average levels of an inflammatory marker of 86.6 mmol/mL and the 40 individuals in the group not taking the oil had levels of 102.9 mmol/mL. Describe the population parameter in the context of the problem.

A member of the US Forest Service was assigned to find a rep…

A member of the US Forest Service was assigned to find a representative sample of heights (in feet) of Alligator Juniper (Juniperus deppeana), a tree species common in the Coconino National Forest. The forester, having procrastinated, decided to measure the first 35 trees closest to his house, obtaining an average height of 60.233 ft.  Based on the previous confidence interval, can the forester be confident the mean height of all Alligator Juniper is greater than 60 feet? Explain by interpreting the interval in context. 

An experiment was conducted seeing whether senior citizens t…

An experiment was conducted seeing whether senior citizens taking fish oil supplements had lower levels of inflammation on average than those not taking the supplement. In the experiment, the 36 senior citizens in the group taking the oil had average levels of an inflammatory marker of 86.6 mmol/mL and the 40 individuals in the group not taking the oil had levels of 102.9 mmol/mL. Select the variable(s) of interest and whether they are categorical or quantitative.