AP Stats Unit 2 MCQ Practice
Flashcard
•
Mathematics
•
12th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a residual in the context of regression analysis?
Back
A residual is the difference between the observed value and the predicted value from a regression line.
2.
FLASHCARD QUESTION
Front
What is the least-squares regression line?
Back
The least-squares regression line is the line that minimizes the sum of the squares of the residuals (the differences between observed and predicted values).
3.
FLASHCARD QUESTION
Front
How do you interpret the slope of a least-squares regression line?
Back
The slope indicates the change in the dependent variable for each one-unit increase in the independent variable.
4.
FLASHCARD QUESTION
Front
What does r² represent in regression analysis?
Back
r² represents the proportion of variance in the dependent variable that can be explained by the independent variable.
5.
FLASHCARD QUESTION
Front
What is correlation?
Back
Correlation is a statistical measure that describes the strength and direction of a relationship between two variables.
6.
FLASHCARD QUESTION
Front
What is the difference between correlation and causation?
Back
Correlation indicates a relationship between two variables, while causation implies that one variable directly affects the other.
7.
FLASHCARD QUESTION
Front
What does a positive correlation indicate?
Back
A positive correlation indicates that as one variable increases, the other variable also tends to increase.
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