Chi-squared test Flashcards
What would the null hypothesis be for a chi squared test be?
There is no signifiant difference between the expected and observed results
When do you use a chi squared test?
When using categorical data
When comparing observed and expected results
How do you calculate the expected number of offspring?
Total number of offspring/ratio total x predicted ratio
How do you calculate degrees of freedom?
Number of classes minus one
What probability level do you use?
0.05
What happens if your calculated chi squared value is more than or equal to the critical value?
reject the null hypothesis
Something other than chance is causing the difference
There is a significant difference in the results
What happens if your calculated chi squared value is smaller than the critical value?
accept the null hypothesis
Chance is more than likely causing the results
No significant difference in the observed and expected results
This is what you want
