Some scientists believe that alcoholism is linked to social isolation
1. Some scientists believe that alcoholism is linked to social isolation. One measure of social isolation is marital status. A study of 280 adults is conducted and each participant is classified as not alcoholic, diagnosed alcoholic or undiagnosed alcoholic, and categorized by marital status. Is there significant evidence of an association? Run the appropriate test at a 5% level of significance.
Alcoholic Not Alcoholic
Married 21 37 58
Not Married 59 63 42
2. Suppose a hypertension trial is mounted and 18 participants are randomly assigned to one of the comparison treatments. Each participant takes the assigned medication and their systolic blood pressure (SBP) is recorded after 6 months on the assigned treatment. The data are as follows.
Standard Treatment Placebo New Treatment
124 134 114
111 143 117
133 148 121
125 142 124
128 150 122
115 160 128
Is there a difference in mean SBP among treatments? Run the appropriate test at =0.05.
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