Question

Out of the variables provided below:

1) Select one dependent variable, one primary independent variable, and one potential confounding variable that will be used for linear regression.

2) State a possible research question and hypotheses (null and alternative) for these variables

Variables: Sex, Age, Education Level, Smoking Status, Employed, Minutes Exercised, Annual Income, Neighborhood

Answer 1

(1)

(i)

one dependent variable = Smoking Status

Explanation: In this experimentation, the research question is about Smoking Status. So, it is dependent variable.

(ii)

one primary independent variable = Minutes Exercised

Explanation: In this experimentation, the research question is about effect of Minutes of Exercise on Smoking Status. So, it is independent variable.

(iii)

one potential confounding variable that will be used for linear regression. = Neighborhood

Explanation: In this experimentation, if the neighbors are heavy smokers, it will affect the Smoking Status of the individual irrespective of Minutes of Exercise. So, it is potential confounding variable.

(2)

(i)

a possible research question : Does the hours of exercise a person spends per day reduce his smoking habits?

(ii)

H0: Null Hypothesis: = 0 (There is no linear relationship between Smoking Status and Minutes Exercised)

HA: Alternative Hypothesis: 0 (There is linear relationship between Smoking Status and Minutes Exercised)