Attempts:* Do No Harm: /2 2. Choosing the appropriate null hypothesis Aa Aa The

Question

Attempts:* Do No Harm: /2 2. Choosing the appropriate null hypothesis Aa Aa The anxiety disorder "social phobia" is characterized by a marked and persistent fear of being negatively evaluated by others. Symptoms include blushing, pounding heart, trembling, sweating, and shortness of breath. Individuals with social phobia have an increased propensity for abusing alcohol. Suzanne Thomas was interested in how alcoholics with social phobia compared with alcoholics without social phobia. She matched alcoholics without social phobia to those with social phobia on several variables, including age and gender. She then queried participants in each group about the severity of their alcohol dependence. Thomas did not predict direction. Identify the research design of this study: Identify the appropriate nul hypothesis for this research design:

Explanation / Answer

The null hypothesis always contains " less than or equal to sign " ; " greater than or equal to sign" or "equal to sign".. so option A and C is wrong... and it is test for difference between two means.

So option B) is correct

H0 : mu1 - mu2 = 0

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