Ch. 3.3 (Scatter Diagram Of Bivariate Measurement Data)

Question 1

Bivariate Data

Answer 1

Data that has two different variables (x,y)

Question 2

Scatter Plot

Answer 2

The resulting diagram from constructing a plot with the variable X along the horizontal axis, the variable Y along the vertical axis, and each (Xi, Yi) observation indicated with a dot

Question 3

Linear Correlation Coefficient (R)

Answer 3

Measures the strength of the linear relationship between the paired x- and y-values in a sample

R > 0 (positive correlation)
R < 0 (negative correlation)
R = 0 (no correlation)
*closer to 1 or -1, the stronger the relationship

Question 4

Regression Line

Answer 4

The straight line that best fits the scatterplot data

y = mx + b