Why is the statistical validity of a multiple regression design more complicated to interrogate than a bivariate design?
It is harder to detect outliers
.
Which popular media headline does not suggest that multiple regression has been used?
Terms in this set (10) Which popular media headline does NOT suggest that a multiple regression has been used? “
Dog ownership decreases stress.
“
Which of the following is a reason why multiple regression designs are inferior to experimental designs?
According to the textbook, which of the following is a reason that multiple regression designs are inferior to experimental designs?
They can only control for third variables that are measured.
Which of the following is a probable reason for Dr Farah’s choice not to conduct an experiment?
Which of the following is a probable reason for Dr. Farah’s choice not to conduct an experiment?
It would be unethical to manipulate whether students are told to do homework for a semester
. For Dr.
Why is it problematic when journalists only report on a single study?
Why is it problematic when journalists only report on a single study?
It can lead people to value one study over decades of previous research
.
What is multiple regression example?
In the multiple regression situation, b
1
, for example, is
the change in Y relative to a one unit change in X
1
, holding all other independent variables constant
(i.e., when the remaining independent variables are held at the same value or are fixed). …
How do you interpret multiple regression?
- Step 1: Determine whether the association between the response and the term is statistically significant.
- Step 2: Determine how well the model fits your data.
- Step 3: Determine whether your model meets the assumptions of the analysis.
What are the two main reasons to conduct a factorial study?
What are two reasons to conduct a factorial study? –
They test whether an IV effects different kinds of people, or people in different situations in the same way
. -Does the effect of the original independent variable depend on the level of another independent variable?
How do you know if a study is internally valid?
- Your treatment and response variables change together.
- Your treatment precedes changes in your response variables.
- No confounding or extraneous factors can explain the results of your study.
When determining mediation how many steps are necessary?
There are
6 steps
to a formal mediation; 1) introductory remarks, 2) statement of the problem by the parties, 3) information gathering time, 4) identification of the problems, 5) bargaining and generating options, and 6) reaching an agreement.
Which of the following is an advantage of using quasi experimental designs?
Which of the following is an advantage of using quasi-experimental designs?
They allow researchers to capitalize on random assignment. They allow researchers to enhance external validity
.
Which is a method for preventing selection effects?
Matching
has the advantage of randomness because each member of the matched pair is randomly assigned, the technique prevents selection effects and ensures that the groups are equal on some important variable before the manipulation of the iv. Independent groups: different participants are exposed to each condition.
Which of the following is an advantage of within groups designs?
What are some advantages of within groups designs?
It ensures the participants in the two groups will be equivalent
(because they are the same people). Variations among participants will not effect results because their scores are only rated against themselves and not others.
What is science and technology reporting?
Science and Technology Reporting (MAC 414) is a
one-semester, three- credit unit course
. It is designed to acquaint students with the knowledge, principles and skills of science and technology reporting. … There is also provision for tutor-marked assignments and students are advised to handle this with all seriousness.
What is multiple regression used for?
Multiple regression analysis allows
researchers to assess the strength of the relationship between an outcome (the dependent variable) and several predictor variables
as well as the importance of each of the predictors to the relationship, often with the effect of other predictors statistically eliminated.
What are some applications of multiple regression models?
Multiple linear regression allows us
to obtain predicted values for specific variables under certain conditions
, such as levels of police confidence between sexes, while controlling for the influence of other factors, such as ethnicity.
