When do we use correlations?
we use correlations when we want to know how two variables are related to each other.
What is the co-efficient for correlation?
(r) - value which measures the strength of the relationship between two variables
What is symbol for positive correlations?
(/) - values increase in the same direction
What is the symbol for negative correlations
values increase in opposite directions
What are the values of r?
.10 - .39 - weak
.40 - .69 - moderate
.70 - 1.00 - strong
What are scatterplots?
Try to draw an imaginary line through the center of the data
X axis/ Y axis - different variables
What is null correlation?
This means no relationship