Bivariate and Univariate Data Revision

Pearson's correlation coefficient is used to

• find the standard deviation of the response variable

• find how strongly two variables are associated

• how good looking the scatterplot is

• the gradient of the regression line

The correlation coefficient of -0.95 implies

• strong positive association

• weak negative association

• weak non-linear association

• strong negative association

Estimate the correlation coefficient of

the scatter plot shown above

• 0.75

• -0.99

• 0.13

• -0.88

Which of the following statements is correct?

• x axis stands for independent variable and y axis stands for dependent variable.

• Scatter plots can be used to describe relationships between categorical data.

• Explanatory variable should be on the y axis

• Response variable should be on the x axis

Bivariate data involves

• one variable

• two variables

• three variables

• four variables

Choose two words from those listed below to best describe the correlation between the two variables.

• strong

• weak

• positive

• negative

___ data for two variables.

• trivariate

• bivariate

• positive

• negative

Bivariate data is the study of how many variables?

• 3

• 1

• 2

• 0

Bivariate Data involves how many variables?

• Zero

• One

• Two

• Three

What type of graph do we use most often to represent Bivariate data?

• Histogram

• Pie Chat

• Sctatterplot

• Box Plot