State ALL the null and alternative hypotheses for the problem below: A study was

Question

State ALL the null and alternative hypotheses for the problem below:

A study was performed to determine the effects of two different types of treatment of hemophobia (fear of blood). Each of 72 biology students complaining of severe hemophobia was randomly assigned to one of the 12 treatment combinations with the restriction that 6 students be assigned to each treatment combination. Thus the design is balanced. Treatment A represents three types of fear reduction therapy. Subjects in the first level of Treatment A served as the control group and did not receive any therapy. Subjects in the second and third levels of Treatment A participated in therapies denoted as A2 and A3, respectively. Treatment B represents four doses of an antianxiety medication. The dose level increases from B1 (placebo; no medication) to B4 (maximum dose). Therapy sessions occurred while the subjects were under the influence of the drug. The dependent variable is the magnitude of the electrodermal response (edr, in arbitrary units) when subjects were exposed to blood. Higher values of edr indicate greater hemophobia. Subjects were not under the influence of the drug when the electrodermal response was measured

Explanation / Answer

Answer:

Null hypothesis: There is no significant difference in edr values between treatment 'A' and treatment 'B' strategies for hemophobia.

Alternate hypothesis: Improvement in the students with the 'B' treatment strategy rather than 'A' treatment strategy'.

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