Biology and Stats (in AS and A2) Flashcards
1
Q
Using standard deviation, when are results insignificant and why?
A
When the standard deviations overlap, this means that the results are likely due to chance
2
Q
What stats test do you use to look for associations?
A
Spearman’s Rank
3
Q
What stats test do use to compare frequencies?
A
Chi-squared test
4
Q
What stats test do you use to compare means?
A
Students t test
5
Q
When do you reject the null hypothesis?
A
If your value is greater than the critical value (usually p= 0.05)
6
Q
How do you interpret chi-squared?
A
Small value- lower significant difference
7
Q
How do you interpret Spearman’s rank?
A
Positive number- positively correlated. Larger value- greater correlation
8
Q
How do you interpret t test?
A
If calculated value is greater than critical value, reject null hypothesis
