Practicals Flashcards
What is an Independent variable
It is the variable that is being changed
What is a dependant variable
It is the variable that is measured
What is a control variable
It is the variable that you control and keep constant
What is a confounding variable
It is the variable that you cannot control but you measure as it may have an effect ( in replace of control)
What are the steps taken to improve the reliability of your results
Repeat and calculate a mean
What is the purpose of spearman’s rank
Finds weather there is a statistically significance correlation between 2 variables
What critical value should p=
0.05
What is on the left side of the cortical value table for spearman’s rank
Number of paired samples
T test
Tests if there is a significant difference between 2 means
What is the calculation for the degrees of freedom for t test
Number of samples in one plus number in another - 2
Degrees of freedom for Chi squared
n-1
n= number of categories
T test has to have normally distributed data
