I
<3
Torrezzzz
1
describe this correlation
Fairly Strong Negative Linear Correlation.
1
Where would the explanatory variable go, Y or X?
X
1
Where does the response variable go, X or Y?
Y
2
What is an extrapolation?
The use of a regression line for prediction far outside the interval of X values used to obtain the line.
2
What is the Residual?
(hint: AP)
Actual (Y)- Predicted (Ŷ)
2
What does correlation mean?
Correlation measures the direction and strength.
3
Fill in the blank:
_?_= measures the typical ________ between the actual y values and the predicted y values
S, Distance
3
What is the purpose of a residual plot?
to assess if the form of the model we are using matches the form of the association
3
_?_: measures the _______ reduction in the sum of squared residuals when using the least-squares regression line to make predictions, rather the mean value of y.
R^2, Percent
4
What does this find?
multiply the correlation coefficient (r) by the ratio of the standard deviation of y (sy) to the standard deviation of x (sx). For the y-intercept (b0), subtract the product of the slope and the mean of x from the mean of y.
Slope (b1)
4
How is a Scatter plot made?
Label the axes
Explanatory variable under the horizontal
Response variable on the vertical
4
What does a scatter plot show?
Shows the relationship between 2 quantitative variables measured on the same individuals. Each individual appears as a point on the graph
-Scatterplots are the only choice for displaying the relationship between two quantitative variables. For a single quantitative variable you have boxplot etc...
5
What two pieces of clothing does Torrez match?
Shirts and socks
5
True or False: Mr. Torrez does drive by's during holidays.
True
5
List the 4 relationships between quantitative variables.
Direction, Unusual features, Form, Strength