Introduction to Epidemiology 6th Edition by Ray M Merrill

Exercise 4

Suppose you suspect, based on descriptive epidemiology, that college students who perform better academically are more likely to have an office job and be obese 10 years after graduation. You decide to select 500 graduating seniors randomly, and classify themaccord- ing to grade point average as high versus low (where the cut point is at the median of the GPAs for these students). The resulting 2 × 2 contingency table is as follows:

Obese at 10 Years
GPA	Yes	No	Total
High	60	190	250
Low	40	210	250
Total	100	400	500

Apply this data to the six steps of hypothesis.

Step 1 of 4

The statement that is commonly believed by the people is known as null hypothesis (). The statement that one makes which opposes the null hypothesis is known as research or alternative hypothesis (). There are six steps that are used for measuring the relationship between the exposure and the results or outcomes and show that they are statistically important.