We learned this week that a chi-square analysis has requirements
for variables that are unique from the other analyses we've
considered. For instance, the variables must be exhaustive, so they
must include all possible answers. For this reason, something like
yes and no are valid since those would be the only two options,
unless you had someone who couldn't answer it for various reasons.
Similarly, it needs to be mutually exclusive, so someone couldn't
be in two categories at the...