Key terms correlation Flashcards
whats a positive correlation
the line is going upawards in a positive line, all dots joined up
If one co-variable increases so does the other!
define correlation
Correlations are examining how two, un-manipulated co-variables interact with each other.
Correlations study the relationship between the variables.
define negative correlation
If one co-variable increases the other decreases
lines going down
define no correlation
If there is no relationship between the co-variables
whats operationalisng variables
2 co-variables you must ensure you operationalise both as quantitative data that is either ordinal or interval/ratio level data so it can be placed on a scatter graph.
whats an alternative 1 tailed correlation
There will be a significant positive/negative correlation between co-variable x and co-variable y.
whats a null corrleation hyptohesis
There will not be a significant correlation between x and y; any relationship will be due to chance factors.
whats an alternative 2 tailed corrleation
There will be a significant correlation between co-variable x and co-variable y.
whats a co variable
one of the factors your looking for a relationship between
whats corrleation co officient
scale showing numbers to determine conclusion of the graph
positives of correlation
-Correlations can reveal new information by analysing the relationship between already existing data. E.g. the correlation between GCSE maths grade and A level maths grade might reveal something new with secondary data.
-Correlation can be used when variables cannot be manipulated for practical or ethical reasons e.g. the correlation between A&E visits and alcohol consumption.
-Correlations can be a good starting point for research and lead to further investigation.
weaknesses of correlation
Correlations do not tell us about cause and effect. Say there was a correlation between number of T-shirts worn and ice cream consumption. That does not mean T-shirts cause people to eat ice cream.
Cannot collect qualitative data
