Members of the Australian Neurology Society studied the relationship between headaches in 96 subjects diagnosed with hypersomnia and 96 healthy controls. Use the results in the table below to answer the following questions.
Reported Headaches Did Not Report Headaches
Hypersomnia Subjects 21 75
Healthy Controls 19 77
Calculate the incidence of headaches among healthy controls. (2 points)
Calculate the incidence of headaches among hypersomnia subjects. (2 points)
Calculate the Relative Risk for headaches due to having been diagnosed with hypersomnia. (2 points)
Interpret your findings from question 3. (2 points)
Complete the following table with the expected frequencies. (2 points)
Reported Headaches Did Not Report Headaches
Hypersomnia Subjects
Healthy Controls
Suppose we wish to know if there is a significant difference (α=0.05) in reported headaches between the hypersomnia subjects and the healthy controls. Carry out a chi-square test in excel, report your p value and state your conclusion. (4 points).