g3 Flashcards
Response Variable.
dependent variable
Unexplained Responses.
error
Explanatory Variable.
Independent Variable
Line used to represent the relationship between response and explanatory
variable
. Linear Relationship
A mathematical representation (or mathematical model) of observed data.
Statistical Model
What is the purpose of a simple linear regression model?
C) To predict values of an output variable based on an input variable
What is the definition of the slope in linear regression?
D) The change in the response variable for a unit change in the explanatory variable
What effect does adding an additional explanatory variable to a linear regression have on the
slope of the original variable?
D) It increases the slope of the original variable
If the slope of a linear regression is 2, what does it mean?
For a unit increase in the explanatory variable, the response variable increases by 2
If the slope of a linear regression is negative, what can we say about the relationship between
the explanatory and response variables?
B) There is a negative relationship
If two variables have a positive association, the slope is
positive
If two variables have a negative association, the slope is
negative
if two variables are not associated, then the slope is
0 (and the line is horizontal)
The point where the line or curve crosses the axis of the graph.
Intercept
a measure of its steepness.
Slope
The best way to find violations and errors is to examine the plot themselves.
t orr f
true
The regression line can be plotted anywhere on the graph even at points when it
doesn’t make sense.
true or false
false
Violations against normality mainly revolves around errors when it comes to the
normal distribution of plotted data.
true
You can transform the formula of some variables in the software you are using in
case that your data is not linear.
true
An outlier does not affect the appearance of the graph at all.
false
A term given to a data that lies outside the normal expected data pattern.
Outlier
The type of error which refers to the rejection of a null hypothesis that is actually true in
the population.
type 1 error
The violation concerned with the independent variables and samples used.
b. Violation against Independence
The concept which assures that the values of the samples received doesn’t affect other
samples.
independence