$13.$ Traditional dimension reduction methods such as factor analysis $($check all that apply$)$:

a$)$ Can be effectively used with textual data

b$)$ Can reliably estimate textual data

c$)$ Cannot be effectively used with textual data

d$)$ Cannot reliably estimate textual data

e$)$ Are the same as topic models

$14.$ Topic models rely on statistical analysis, which requires $($check all that apply$)$:

a$)$ Text

b$)$ Numbers

c$)$ A personal computer $($PC$)$

d$)$ A spreadsheet

e$)$ None of the above

SHORT ANSWER QUESTIONS

$15.$ What are some of the challenges that come with analyzing online reviews?

Answer:

$16.$ Please briefly explain the general idea behind topic models

Answer: