Statistical Tests Flashcards
What does t test do
Compare two means
What is degrees of freedom?
The number of values in a statistical calculation that are free to vary
How do you calculate degrees of freedom?
Sample size - number of data sets
What significance level do we always consider in biology?
The 5% significance level
What happens if it is greater than 5%?
Difference between the sets is significant
What is a correlation coefficient?
Used to consider the relationships between two sets of data
What is D in spearman rank
Difference between ranks
What happens if it is lower than the critical value?
No significant correlation
What does the Spearmans rank correlation coefficient do?
helps us consider the relationship of the data
What does standard deviation measure?
The spread of the data
