1
Q
what is the chi squared test used for
A
to measure the size of the difference between observed experimental results and expected theoretical outcomes
2
Q
the chi squared test is used to test the _______ ___________
A
null hypothesis
3
Q
define null hypothesis
A
there is no significant difference between what we expect and what we observe, any difference is caused by chance
4
Q
write the formula for the chi squared test
A
χ² = Σ [(O− E)² / E
5
Q
what does O stand for
A
observed frequencies
6
Q
what does E stand for
A
expected frequencies
7
Q
how do you calculate the degrees of freedom
A
n-1
8
Q
what does n stand for
A
the number of categories or possible outcomes
9
Q
in the case of phenotypic ratio, what is n
A
the number of possible phenotypes
