(3) Chi Square Analysis Flashcards
1
Q
When will predicted ratio not be valid in a chi square test?
A
If deviations occur by chance 5% of the time or less
2
Q
Ho?
A
Null hypothesis, observed data does approximate the ratio
3
Q
Ha?
A
Alternative hypothesis, observed data doesn’t approximate the ratio
4
Q
Chi square formula?
A
X^2 = sum of (observed-expected)^2/expected
5
Q
Degrees of freedom?
A
df = # segregating classes - 1
6
Q
How to get expected?
A
Probability of phenotype occurring x total observed
