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bidimensional stadistic - Coggle Diagram
bidimensional stadistic
Line of best fit
Straight line which fit scatter diagram
Shows the trend along the dots
Using it to make estimations
IrI
Smaller than 1
We shouldn't make estimations
Close to 1
Estimation will probably connect
Correlation coefficient
Precise estimation
Correlations
value
correlations coeficient
it depends on how the dots are aligned
highest value
-1
negative correlation
1
positive correlation
represented by the letter "r"
sing
+
one variable increases the other also increases
-
one variable increases the other decreases
definition
relationships between the values
Strength
strong
weak
How close the dots on the diagram are to the line of best fit
Scatter diagrams
definition
use a point to represent each xi the coordinates are (x,y)