You are a senior student enrolled in a research course. The instructor has given

Question

You are a senior student enrolled in a research course. The instructor has given you the following problem statement: “Does completion of a mandatory health promotion course affect the incidence of smoking cessation among college students who smoke?” Your population consists of all freshman students enrolled in the mandatory physical education course, which all freshmen must take as a part of the university requirements. Some of these students may be smokers.

Based on this problem statement, complete the following:

1) Develop a) null hypothesis and b) an alternative hypothesis (directional or non directional) drawn from this problem statement-This means you should have two hypotheses

2) Identify the independent and dependent variables-Be specific

3) Describe how you will conduct this study including:

a) Sampling strategy-be specific: 1) Identify the population; 2) What specific sampling strategy you will use to draw the sample for this study from the population

b) Define the variables and state specifically how the independent and dependent variables will be measured (nominal, ordinal, interval, ratio)              

c) Informed consent addressed              

d) How data will be collected              

e) One potential threat to internal validity and one potential threat to external validity based on your selected scenario

Explanation / Answer

Question 1

The null and alternative hypothesis for the given scenario or testing of hypothesis is given as below:

Null hypothesis: H0: There is no any significant effect of completion of a mandatory health promotion course on the incidence of smoking cessation among college students who smoke.

Alternative hypothesis: Ha: There is a significant effect of completion of a mandatory health promotion course on the incidence of smoking cessation among college students who smoke.

We can also write these hypotheses as below:

Null hypothesis: H0: Completion of a mandatory health promotion course does not affect the incidence of smoking cessation among college students who smoke.

Alternative hypothesis: Ha: Completion of a mandatory health promotion course affects the incidence of smoking cessation among college students who smoke.

This is a non-directional hypothesis or two tailed hypothesis test.

Question 2

For the given scenario, the independent variable is given as the completion of a mandatory health promotion course while the dependent variable is given as the incidence of smoking cessation among college students who smoke.

Question 3

Part a

1]

The population for the given study is the set of all freshmen students in the university.

2]

We will use stratified random sampling for selection of random sample so that all freshmen in the different classes would get proper representativeness and it would help to avoid biased estimate.

Part b

Independent variable - completion of a mandatory health promotion course – Nominal scale of measurement

Dependent variable - incidence of smoking cessation – Nominal scale of measurement

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