categorical data

Question 1

What test is used for categorical data?

Answer 1

-Chi-squared

Question 2

What is a contingency table?

Answer 2

-Table of frequencies
-How often observation occurs

Question 3

What are the two assumptions?

Answer 3

1: Independence = each person can only contribute to one cell
2: Expected frequencies = total should be more than 1 and no more than 20% can be less than 5

Question 4

What is the process of chisquared?

Answer 4

1: Calculate exp. frequencies
2: Calculate chi-squared value based on exp. and obs. frequencies
3: Compare chi-squared value against critical value

Question 5

How do you calculate the DF for 1 IV?

Answer 5

-DF = num of categories - 1

Question 6

How do calculate the DF for 2 IVs?

Answer 6

-DF = (num. of rows - 1) x (num. of columns - 1)

Question 7

What is a binomial test?

Answer 7

-Conducted if there are 2 levels of a variable

Question 8

How can you tell if data in chi-squared is significant?

Answer 8

-If it’s less than 0.05