Suppose we measured the blood pressure of 100 randomly selec…
Suppose we measured the blood pressure of 100 randomly selected patients in a hospital. Our aim is to evaluate which variable, age or gender, is associated with blood pressure. We record the patient’s age as 1 if their age is greater than 65, and 0 otherwise. Similarly, we record the patient’s gender as 1 if they are female, and 0 if they are male. The scatter plots below depict these associations. We obtained two F test statistics: 194.91 for comparing the average blood pressures among age groups, and 0.0221 for comparing the average blood pressures among gender groups. The cutoff for an upper tail probability of 0.05 under an F distribution with df1=1 and df2=98 (=) is 3.938. What is your conclusion?