Stats Tests

Question 1

How to calculate degrees of freedom

Answer 1

N - 1
N = the number of different categories

Question 2

When do you use a Chi Squared Test

Answer 2

To compare frequencies of observed and expected data

Question 3

How to tell if the data is significant or not using a Chi Squared Test

Answer 3

Chi-squared is greater than the critical value (p=0.05) - reject the null, there is a significant difference
Chi-squared is less than the critical value (p=0.05) - accept the null, not a significant difference

Question 4

What is the p value we use?

Answer 4

0.05 or 5%

Question 5

How do you start a null hypothesis

Answer 5

There will be no difference…

Question 6

When do you use a T Test

Answer 6

To compare two means for normally distributed data

Question 7

How to tell if the data is significant or not using a T Test

Answer 7

T value is greater than the critical value - reject the null, there is a significant difference
T value is less than the critical value - accept the null, not a significant difference (due to chance)