I.V. STAT!
Quick Question
Correlation & Linear Regression
Asking the Uninformed
Duke Dogs
100
Other names for explanatory variable?
Predictor, Independent variable, typically
denoted with X
100
What is it called when you're asking two things in one question?
Double-barreled
100
Does a statistical relationship always mean causation?
No
100
This quasi-Kardashian is from Chicago...
Kanye West
100
Where is JMU located?
Harrisonburg, Virginia
200
Other names for response variable?
Outcome, Dependent variable, typically denoted
with Y
200
What is it called when a subject gives an answer because it's what they think the researcher is looking for?
Social desirability
200
What kind of relationship is this?
There is no relationship
200
This quasi-Kardashian is from Chicago...
Kanye West
200
How long has Dr.Cochran been apart of Thrive?
3 years
300
What type of study is this?
Randomized
300
What kind of bias: A question is worded to elicit a specific response.
Deliberate bias
300
A numerical measure of the strength and direction of a linear relationship between two numerical variables. What is this?
Pearson’s Correlation Coefficient (r)
300
Name one of Ella's favorite artists...
Chappell Roan
400
20 students take a pre-test at the start of academy and the same 20 take a post test at the end of academy to measure how much they learned. What kind of design is this?
Within-groups design
400
What's an example of Likert scale?
Typically a 1-7 scale that expresses different opinions: strongly agree, agree, neutral, disagree, strongly disagree
400
What does the least squares regression line do?
A line that minimizes the total residuals
Examines how well X predicts Y
400
How many places has Adiba traveled to?
Scotland, London, Jamaica & Afghanistan (4)
500
"Observe differences in the explanatory variable and notice whether these are related to differences in the response variable"
Observational study
500
What's the difference between confidentiality and anonymity?
Confidentiality: researcher promises not to release identifying info about respondents
Anonymity: research does not know what answers belong to what participants/identifying info about participants
500
Which r value represents a stronger correlation? r=0.4 or r= -0.8
r= -0.8 (just because it's negative does not mean it' weaker!)