Home
Subjects
Create
Search
Log in
Sign up
Upgrade to remove ads
Only $2.99/month
Ch. 1 Introduction to Simple Linear Regression
STUDY
Flashcards
Learn
Write
Spell
Test
PLAY
Match
Gravity
Terms in this set (15)
What is the relationship between the variables in simple linear regression?
The criterion variable (Y) is used to predict the value of the predictor variable (X).
What happens to simple linear regression when both the independent and dependent variables are scale (form a perfect straight line)? Why is this not likely in behavioral and social research?
Finding a linear equation that fits the given data would be easy and straightforward. B/c it is rare that the data perfectly linearly related
Pearson correlation coefficient/ correlation coefficient
a descriptive statistic that describes the linear relationship between two attributes. (r=...)
How do we choose the "best-fitting line"?
Take the line that (on average) comes closest to all of the scatter plot points
What is the line of best fit called?
(least squares) regression line** or
(least squares) prediction line
What is it called when there is only one predictor variable?
Simple regression
What is y hat? (Ŷ)
The predicted value of y
Error of prediction for a point
The value of the point minus the predicted value (the value on the line). (Y-Y')
Regression line equation
y'=bX+A
(Y' is the predicted score, b is the slope of the line, and A is the Y intercept)
MX, MY, sX, sY, and r
Mx= mean of x
MY= mean of y
sX=standard deviation of X
sY= standard deviation of Y
r= correlation between X and Y
How do you calculate slope b? (regression coefficient)
b = r sY/sX
(slope b= r times slope of x divided by slope of y)
How do you calculate intercept A?
A = MY - bMX
(intercept A= mean of Y minus slope b times mean of X)
What is the regression equation used for?
To find the predicted Y for a given value of X
The values of b and a can be used to explain the relationship between ___ & __.
X & Y
What is the equation for standardized regression?
ZY' = (r)(ZX)
You might also like...
BLESSING Chap 5 vocab
28 terms
Least Squares Regression Line
9 terms
chapter 14
46 terms
ST 260 Final Exam
53 terms
Other sets by this creator
Ch. 23: The Evolution of Populations
22 terms
Ch. 22: Descent With Modification: A Darwinian Vie…
16 terms
Ch. 7 Membrane Structure and Function
33 terms
Ch.6 A Tour of the Cell
72 terms
Other Quizlet sets
Social Development Exam 4
102 terms
Consumer Education Final 2013
11 terms
Community Ch 9
47 terms
English Quiz #2
29 terms