STAT 301 Lecture 6: STAT 301 Lecture 6
Document Summary
Example: a hospital wants to determine the effectiveness of using helicopters to bring in patients to the hospital. They take the records of 178 patients who were brought into the hospital by ambulance or helicopter and record whether the patient had died in the two-week after admittance. 28: p(death | ambulance) = 23/153 = 0. 1503, p(death | helicopter) = 5/25 = 0. 2, there is more information we can consider when looking at these cases. Let"s split the table up by the severity of the patient"s condition. Total: p(death | ambulance) = 8/100 = 0. 08, p(death | helicopter) = 0. Total: p(death | ambulance) = 15/53 = 0. 283, p(death | helicopter) = 5/23 = 0. 2174. Is it better to split the data up into smaller groups based on this other variable, or do i want a generalization: this will depend on your situation. If you are measuring something that is already in perentages, it isusually easier to just talk about.
