Statistics Quiz #2

Categorical Data Analysis

Collection of tools that you can use when your data are nominal scale

Chi-square goodness-of-fit

Categorical finds out how well the observed scores fit w the scores a particular model predicts

Always a one-sided test

Used when you have a table of observed frequencies of different categories, and the null hypothesis gives you a set of “known” probabilities to compare them to.

Expected Frequencies

if the null hypothesis were true, what would we expect to see?

(Chi-square) Distribution

Degrees of Freedom

number of “normally distributed variables” that I’m squaring and adding together

You calculate it by counting up the number of distinct “quantities” that are used to describe your data and then subtracting off all of the “constraints” that those data must satisfy

One-sided Test

Critical area of a distribution is one-sided so that it is either greater than or less than a certain value, but not both.

Yates Correction