QUESIIOH 1.1. \\A DOIHIS) You are interested in whether vaccination is effective in reducing the risk of pneumonia. You conduct a study and randomly assign 92 volunteers to receive the active vaccine, and another 92 to receive a placebo vaccine. You then follow the participants for five years and record cases of pneumonia in both groups. You obtain the data below, and you want to know whether the proportion of patients in the outcome groups differs by vaccination status. What number should you use for the expected value of unvaccinated patients who got sick with pneumococcal pneumonia? Health Outcome Unvaccinated Vaccinated Sick with pneumococcal 23 5 pneumonia Sick with non-pneumococcal 8 10 pneumonia No pneumonia 61 77 participants for five years and record cases of pneumonia in both groups. You obtain the data below, and you want to know whether the proportion of patients in the outcome groups differs by vaccination status. What value should you use for your critical value if you want to determine whether there's a statistically significant difference between the groups at an alpha level of 0.05? Health Outcome Unvaccinated Vaccinated Sick with pneumococcal 23 5 pneumonia Sick with nonpneumococcal 8 10 pneumonia No pneumonia 61 77