Locate three different research studies in your area of...

locate three different research studies in your area of interest that use linear regression. It's okay if the studies contain more than one predictor variable. Answer the following questions for each study: 4a. What is one independent variable? What is the dependent variable? 4b. If there is more than one independent variable, what argument does the researcher make that these variables are independent of each other? 4c. Which of the three studies seems to present the least convincing evidence that the dependent variable is predicted by the independent variable, and why?

Transcript

0:00 Let's have a look on the question.

00:01 So here three studies for this question are as follows.

00:03 First one is the relation between age and the blood group.

00:06 So answering the 4a part, we need to find out which one is dependent and which one is independent variable.

00:12 So here independent variable is, independent variable is age because age can be anything so this is not depending on anything.

00:27 So dependent variable would be, dependent variable will be blood pressure because in majority of the cases blood pressure issue rises at a certain age.

00:44 So if a person is older or let us say above 30s or 40s then he will be or they will be having the more chances of blood pressure but if we are talking about teenage or the lesser age group people then they will not be having that much issue of blood pressure.

00:58 So we can say that it is depending on the age group of the people.

01:01 So here age is the independent variable and the dependent variable is blood pressure.

01:05 Now answering the 4b part, this is not applicable because here we only have one independent and one independent variable.

01:12 Now study 2, study 2 would be, we are taking example of education level and income, education level and income and job satisfaction.

01:35 So here for the 4a part, the independent variable will be, here the independent variable is education level.

01:46 Now here there are two independent variables that are education level and income and the dependent variable, dependent variable here is job satisfaction.

02:00 Now here the independent, there are two independent variables because education level somewhat does not depend on or the income somewhat does not depend on the education level.

02:10 There are few categories or there are few examples where education level is lower but the income is higher and vice versa...

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