Question
A researcher is interested in whether a new anti-depressant drug D has an effect on systolic blood pressure. To test this, she recruits 10 people
A researcher is interested in whether a new anti-depressant drug D has an effect on systolic blood pressure. To test this, she recruits 10 people who are eligible to take drug D and have never taken medication for depression to participate in her study, and randomly assigns them to two groups. One group has nD= 5 participants and are given drug D for one month. The other group also has nND= 5 participants, but they are not given any medication for the same time period. After the one month period, the researcher measured the systolic blood pressure of all 10 participants in her study. The following are the data she collected:
Drug condition | No Drug condition |
---|---|
142 | 133 |
135 | 131 |
137 | 120 |
149 | 117 |
141 | 115 |
nD= 5 | nND= 5 |
MD= 140.80 | MND= 123.2 |
unbiased sD= 5.40 | unbiased sND= 8.26 |
-Perform a Oneway ANOVA to determine whether there was an effect of Drug D on systolic blood pressure. Using an alpha level of = .05 , answer the following questions:
- What is the research hypothesis?
- What is the null hypothesis?
- What is the within condition degrees of freedom, dfwithin?
- What is the within condition sum of squares, SSwithin?
- What is the within condition mean squares, MSwithin?
- What is the between condition degrees of freedom, dfbtwn?
- What is the between condition sum of squares, SSbtwn?
- What is the between condition mean squares, MSbtwn?
- Calculate the F-ratio for this experiment.
- What is the critical value of F for this problem?
- Based on the relationship between the value of F you calculated in (9) and the critical value of F you reported in (10), can the researcher conclude that there is an effect of Drug D on systolic blood pressure?
Please show your work so I can see how to correctly perform a one-way ANOVA like this one. I will need the help when its time for my final.
Thank you!
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