Correlation
A graphical depiction of correlation.
What is scatterplot.
As scores on one variable increase, scores on the sound variable decrease.
What is negative correlation?
Predicting values within the range of the dataset
What is interpolation?
The extent or degree to which two variables are related.
What is Correlation
The prediction of one variable from knowledge of another variable.
What is regression?
A single number that represents the degree of relation between two variables.
What is Correlation Coefficient?
Exists when an increase of one unit in one variable is always accompanied by the same proportional decrease in the other variable. r = -1
What is perfect/strong negative correlation?
Exists when an increase of one unit in one variable is always accompanied by the same proportional increase in the other variable. r = 1
What is perfect/strong Positive Correlation.
Two variables under consideration are not related.
What is zero correlation?
The collection, organising, summarising, displaying and analysing of data is
What is a statistical investigation?
The term of a small amount of scatter with strength of association
What is strong?
Even though two variables may be highly correlated, you should not assume that:
What is one variable causes the other?
The correlation coefficient that measures the strength of linear association. Symbolised by r.
What is Pearson's Correlation Coefficient?
A result that occurred rarely by chance.
What is statistically significant?
As scores on one variable increase, scores on the second variable also increase.
What is Positive Correlation
Calculate several predicted values,plot these values, connect the points, and then extend the line to the Y-intercept. This procedure works, but carries with it the potential for calculation errors and inaccurate points.
What is constructing a line of best fit?
Predicting values outside the range of the dataset
What is extrapolation?