Research Scenario 1: The eating disorder anorexia nervosa is characterized by ex

Question

Research Scenario 1: The eating disorder anorexia nervosa is characterized by extremely low body weight and body image distortion. Individuals with anorexia control their body weight by starving themselves and/or exercising excessively. Because anorexia commonly manifests in adolescence, when bone density and bone metabolism are changing dramatically, women who had or have anorexia are vulnerable to bone fractures throughout their lives. You design a study to examine whether a group of women with anorexia have higher intelligence than the general population, which has an average IQ of 100 with a standard deviation of 15 Which hypothesis test is most appropriate for this research design (assuming the test assumptions are satisfied)? O A hypothesis test for the difference between two population means involving independent samples (independent samples t test) O A single-sample z test O A matched sample t test The appropriate test statistic is Research Scenario 2: 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 Which hypothesis test is most appropriate for this research design (assuming the test assumptions are satisfied)? O A a hypothesis test for the difference between two population means involving matched samples (matched samples t test) O A single-sample z test O A hypothesis test for the difference between two population means involving independent samples (independent samples t test) The appropriate test statistic is

Explanation / Answer

Research scenario 1

We will perform a signle sample z test because there is only sample which shall be comapred with the stadnard proportion

Test statistic:

Z = (Anorxic IQ mean - 100)/(15 / sqrt(sampel size)

Research question 2

Here we will conduct a hypothesis test for the difference between two population means involving two independent samples.

Appropriate test statistic is t

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