The Chi-Squared Test
The (Chi-Squared) test
is a methodology for hypothesis testing. When one has categorical data,
in the form of frequency counts or observations (e.g. Vegetarian, Pescetarian, and Omnivore),
split into two or more categories (e.g. Male, Female), a question may arrise such as "Are
women more likely than men to be vegetarian?" or put more accurately, "Is any observed difference
in the frequency with which women report being vegetarian differ in a statistically significant way
from the frequency men report th