MATH-TASTIC Correlation

Dealt with data which involve a single variable.

• Bivariate

• Univariate

• Trivariate

• Monovariate

Data that involve two variables.

• Bivariate

• Univariate

• Trivariate

• Monovariate

A statistical method used to determine whether a relationship between two variables exists.

• Regression analysis

• z-test

• t-test

• Correlation analysis

Which of the following is an example of positive correlation?

• height and weight of a person

• age and memories of a person

• age and number of appliances

• height and number of gadget

Which of the following is an example of negative correlation?

• height and weight of a person

• age and memories of a person

• age and number of appliances

• age and number of experiences

Which of the following is an example of zero correlation?

• height and weight of a person

• age and memories of a person

• age and number of experiences

• height and number of gadget

A graphical representation of the relationship between two variables.

• trend line

• pictograph

• scatter plot

• bar graph

Which of the following is the formula used in Pearson Product-Moment correlation coefficient?

• $r=\frac{n\Sigma XY-\Sigma X\cdot\Sigma Y}{\sqrt{\lceil n\Sigma X^2-\left(\Sigma X\right)^2\rceil\lceil n\Sigma Y^2-\left(\Sigma Y\right)^2\rceil}}$

• $\rho=1-\frac{6\Sigma d^2}{n\left(n^2-1\right)}$

Statistician who developed the Pearson Product-Moment Correlation.

• Karl Pearson

• James Pearson

• John Spearman

• Spearman rho

The line closest to the point. It tells the direction of correlation that exists between the variable.

• Spot line

• Trend Line

• Curve Line

• Scatter Line