A pharmaceutical company wishes to test the effects of a herbal supplement on an

Question

A pharmaceutical company wishes to test the effects of a herbal supplement on anxiety levels. The researcher randomly selects a sample of n=16 adults from Essex County. The sample is randomly assigned to either the herbal supplement, Group B or a placebo, Group A.

Here are the data:

GROUP “A”                                            GROUP “ B “

12, 16, 18, 21,                                        13, 18, 20, 16

17, l8, l8, 19                                            19, 21, 19, 22

l. What is the researcher’s hypothesis?

______________________________________________________________________________________

2. What is the null hypothesis?

______________________________________________________________________________________

3. What is the independent variable?

_______________________________________________________________________

4. What is the dependent variable?

______________________________________________________________________

5. What is the name of the research design in this study?

_______________________________________________________________________

6. What is the appropriate hypothesis test to analyze the data from this study?

________________________________________________________________________

7. What are the two mean “differences” you are analyzing in these data?

__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Explanation / Answer

1:

The reseach hypothesis is :

Ha: Is a herbal supplement reduces anxiety level?

2:

The null hypothesis is :

H0: A herbal supplement does not have any effect on anxiety level.

3:

The independent variable: Treatment (herbal supplement, placebo)

4:

The dependent variable: Effect on anxiety level

5:

Experimental study

6:

Two independent sample t test

7:

Sample mean of group A and sample mean of group B

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