What is the Independent and Dependent Variable for this problem, also state the null hypothesis?
Posted: August 17th, 2010 | Author: admin | Filed under: light therapy for depression | Tags: depressive symptoms, lamps, men and women, null hypothesis, research hypothesis, seasonal depression, time period | 1 Comment »A research study was done on Seasonal depression and the effectiveness of Light Therapy Lamps in men vs. women over a time period of 6 weeks. The men and women were given a survey on depression at the beginning of the treatment, and the same men and women were given the the exact same survey at the end of the treatment. The research stated that at the end of treatment women were reporting less depressive symptoms than men.
Also if possible state the null hypothesis, and the research hypothesis.
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dependant = level of depression since it is the result obtained in the experiment(light therapy)
independant = gender since it is the only variable that could be changed
null hupothesis = assumption that no relation exists in this experiment = there is no relation between gender and the effectiveness of light therapy lamps in the treatment of depression
research hypothesis = the aim of this experiment = a relationship exists between gender and the effectiveness of light therapy lamps in treating depression(note: the research hypothesis is a broad statements that depends on initial assumptions and since it is not mentioned that researchers speculated that light therapy lamps are more effective with women, you cannot say that the research hypothesis is that light therapy lamps are more effective with women)