Question

1. Do "early birds" (people who tend to get up early in the mornings) live longer than "night owls" (people who tend to stay up late at night)? A recently published study in Chronobiology International surveyed a representative sample of more than 150,000 UK citizens between the ages of 38 and 73, and asked them whether they identified as "night owls" or "early birds," and to what degree (moderate or definite). The re Ohe data are then recorded whether leveloped cardiovascular disease (CVD) ized below Definite early birdnight owl Total Definite 14,031 59,045 24,836 97046 38,867 156,091 Developed CVD 45.014 Did not develop CVD 72,210 Total 117 224 Let N- "definite night owl", and C "developed CVD a. Suppose we randomly select an individual from this study. Calculate R(C IN) b. Suppose we randomly select an individual from this study. Calculate P(C Ne). c. [2 pts] Interpret your value from, (b) in the context of the problem without using the words P(CN) 14,031/38,867 361 probability, chance, likelihood, etc. Hint: think about the definition of probability

Answer 1

c.) A probability value of 0.384 shows that if 1000 early birds are chosen then mostly 384 of them would have developed CVD.