Test for frequencies /(categorical data)

Question 1

How to test for frequencies

Answer 1

• categorical - nominal data in 2 or more groups
• Groups are mutually exclusive
• Independent observations
• Must have at least 5 observations in each category ( or use fisher’s extract)

Question 2

What is the formula to test frequencies using chi squared?

Answer 2

(O-E)^2/ E

Question 3

How do you claculate ecpected frequency?

Answer 3

Expected freq = column total x row total/ grand total