G&E: Chi-squared test

Question 1

What is the null hypothesis?

Answer 1

There is no significant different between the observed and expected results.

Question 2

Chi-squared test

Answer 2

A statistical test that’s used to see if the results of an experiment support a theory.

Question 3

What do you compare the X² value to?

Answer 3

A critical value

Question 4

What does it mean if the X² value is greater than or equal to the critical value?

Answer 4

Reject the null hypothesis - there is a significant difference between the observed and expected results.

Question 5

What does it mean if the X² value is smaller than the critical value?

Answer 5

Cannot reject null hypothesis = there is no significant difference between the observed and expected results.

Question 6

Degrees of freedom

Answer 6

Number of items - 1