Equations Flashcards
1
Q
Standard error of the mean
A
SEM = σ / square root of the sample size
2
Q
How to calculate Degrees of Freedom
A
n1 + n2 – 2 (the number of groups)
3
Q
equation of z-scores
A
Z = (X−μ) / σ
4
Q
equation of z-test
A
Z= Xˉ− μ / σ / square root of n
5
Q
how to calculate Pearson Bivariate Correlation Coefficient
A
To calculate it you divide the covariance of the two variables by the sum of their standard deviation.
6
Q
How to work out the Variance
its the differences
A
taking the average of the squared differences between each data point and the mean
7
Q
One Way - ANOVA
A
F = Between-group variability / Within-group variability.
if its > 0.05 then theres at least one effect
