Two-dimensional distributions

Two-dimensional distributions

1. Variance

   • is a measure of how spread out a data set is. It is calculated as the average squared deviation of each number from the mean of a data set.

2. Correlation

   • is a measure of how spread out a data set is. It is calculated as the average squared deviation of each number from the mean of a data set.

3. scatter diagram

   • • The scatter diagram graphs pairs of numerical data, with one variable on each axis, to look for a relationship between them. If the variables are correlated, the points will fall along a line or curve.

4. Line of best fit

   • A line of best fit is a straight line drawn through the maximum number of points on a scatter plot balancing about an equal number of points above and below the line. It is used to study the nature of relation between two variables.