Algebra 1 Bivariate Statistics

Bivariate data involves

• one variable

• two variables

• three variables

• four variables

_________ is a diagram that uses coordinates to display values for two variables for a set of data.

• dot plot

• scatter plot

• histogram

• stem and leaf plot

The words ________, ________ and ________ are used to describe the way in which the variables are related.

• relationship

• generalship

• correlation

• association

The correlation is positive if the y variable generally increases as the x variable increases.

• True

• False

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

• strong

• weak

• positive

• negative

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

• strong

• weak

• positive

• negative

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

• strong

• weak

• positive

• negative

Describe the following time-series plots as having a linear (straight line) trend, non-linear trend (a curve) or no trend.

• linear trend

• non-linear trend

• no trend

Find Pearson's correlation coefficient

• -795.7273

• 35.4848

• 0.6895

• 0.9864

Find the equation of the least squares regression line.

• Weight = -796 +

  35 x length

• Length = -796 +

  35 x weight

• Length = -35 +

  796 x weight

• Weight = 796 +

  35 x length