Introduction
Scatter Plots
Correlation
Least-Squares Regression
Chapter Review
100
The outcome of a study?
What is a response variable?
100
Where the points show a straight-line pattern
What is linear relationship?
100
Measures the strength and direction of the linear association between two quantitative variables x and y. Also known as r
What is correlation?
100
A method to finding a line that summarized the relationship between two variables.
What is least-squares regression?
100
An observation that lies outside the overall pattern of the other observations.
What is an outlier?
200
Attempts to explain the observed outcomes.
What is explanatory variable?
200
An individual value that falls outside the overall pattern of the relationship.
What is an outlier?
200
Correlation squared ; r^2
What is variance?
200
A straight line that describes how a response variable changes as the explanatory variable changes.
What is regression line?
200
A scatter plot of the regression residual against the explanatory variable.
What is residual plot?
300
Explanatory variables are also known as this.
What is independent variables?
300

Direction, form, strength, and outliers

What are the characteristics to describe a scatterplot?

300
There is a (weak, moderatley, strong) (positive, negative) correlation between (explanatory value) and (response value).
What is the sentence for correlation?
300
y(hat) = a + bx
What is the equation of the Least-Squares Regression Line?
300
Measures the direction and strength of the linear relationship between two quantitative variables.
What is correlation?
400
Response variables are also known as this.
What is dependent variable?
400
Shows the relationship between two quantitative variables measured on the same individuals.
What is scatter plot?
400
The difference between the observed value and the value predicted by the regression line.
What is the sentence for variance?
400
The fraction of the variation in the values of y that is explained by the LSRL of y on x.
What is residual?
400
The mean of the Least-Squares Residual is always this number.
What is 0?
500
In any graph of the data, you look for this and for striking deviations from that pattern.
What is the overall pattern?
500
Determined by how close the points in a scatterplot lie to a simple form such as a line.
What is strength?
500
The correlation is always a number between this negative and positive number.
What is 1?
500
_ _ % of the variation in (y-variable) is explained by least-squared regression with (x-variable)
What is coefficient of determination?
500

A display of the possible values of categorical variables as segments of a rectangle. 

What is a segmented bar chart?

M
e
n
u