stats stuff Flashcards
1
Q
what is chi-squared used for?
A
to identify weather the difference between expected and observed results is statistically significant
2
Q
what type of data must be used for chi squared?
A
frequencies for different cateogories with no order (nominal)
3
Q
what is a null-hypothesis?
A
always an assumption that the difference between expected and observed results is not statistically significant… difference is due to random chance
4
Q
what will the value of chi-squared be if the observed results are the same as the experimental results?
A
0
5
Q
the bigger the difference between observed and expected what happens to the chi-squared value?
A
it gets bigger
