Final answer:
The measure of association between eating donuts daily and obesity among students is calculated as the risk ratio. The risk ratio is approximately 9.71, indicating that daily donut eaters have about 9.71 times higher risk of obesity compared to non-donut eaters.
Step-by-step explanation:
To calculate the measure of association between daily donut eating and obesity among students in an epidemiology class, we can use the risk ratio (also known as the relative risk). First, we need to define the two groups: those who eat donuts daily and those who do not.
Let's define the numbers:
- Total students: 75
- Obese students: 3
- Students who eat donuts daily: 7
- Obese students who eat donuts daily: 2
Now we can calculate the risk of obesity among those who eat donuts daily and those who do not.
Risk of obesity in donut eaters = Obese donut eaters / Total donut eaters = 2/7
Risk of obesity in non-donut eaters = Obese non-donut eaters / Total non-donut eaters = (Obese total - Obese donut eaters) / (Total students - Total donut eaters) = (3-2) / (75-7) = 1/68
Finally, we calculate the risk ratio (RR):
RR = Risk of obesity in donut eaters / Risk of obesity in non-donut eaters = (2/7) / (1/68) = 68/7 = 9.71
The risk ratio of 9.71 suggests that the students who eat donuts daily have approximately 9.71 times the risk of being obese compared to those who do not eat donuts daily, indicating a potential association between daily donut consumption and obesity.