correlations - A-Level

Question 1

correlations definition

Answer 1

a mathematical technique in which a researcher investigates an association between two variables, called co-variables

Question 2

correlation coefficient defintion

Answer 2

a number between -1 and +1 that represents the direction and strength of a relationship between co-variables

Question 3

what does the term correlation refer to

Answer 3

a mathematical technique which measures the association/relationship between to co-variables

Question 4

how is a correlation shown

Answer 4

plotted on a scattergram on which each axis represents one of the variables investigated

Question 5

how can correlations be analysed

Answer 5

statistical tests

Question 6

what is the correlation coefficient

Answer 6

numerical value between -1 and +1 which tells us the strength and direction of the relationship between the two variables

Question 7

what does a +1 coefficient mean

Answer 7

perfect positive corelation

Question 8

what does a -1 coefficient mean

Answer 8

prefect negative corelation

Question 9

what can coefficients that appear weak still be

Answer 9

statistically significant as it depends in the size of the data set