7A The Chi-Squared Test

Question 1

What is chi squared

Answer 1

A statistical test used to see if the results of an experiment support the theory
The theory is used to predict a result
A null hypothesis must be what is the made

Question 2

Chi squared equation

Answer 2

X squared equals the sum of (O-E) squared divided by E

E equals expected result
O equals observed result

Question 3

What does a critical value mean

Answer 3

The value of X squared that corresponds to a 0.05 level of probability That the difference between the observed and expected results is due to chance
If your X squared value is larger than or equal to the critical value then there is a
significant difference between the observed and the expected results and the null hypothesis can be rejected

Question 4

What does it mean if the x squared value is small than the critical value

Answer 4

There is no significant difference between the observed expected results and the null hypothesis can’t be rejected