
Chapter 2 TEST

Flashcard
•
Mathematics
•
11th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What type of association does a graph show if there is no correlation?
Back
No correlation means that there is no predictable relationship between the two variables.
2.
FLASHCARD QUESTION
Front
What does Y-hat represent in regression analysis?
Back
Y-hat is the predicted value of y for a given value of x.
3.
FLASHCARD QUESTION
Front
What is the correlation coefficient of a perfect negative correlation?
Back
-1
4.
FLASHCARD QUESTION
Front
What does a correlation coefficient of -.928 indicate?
Back
It indicates a strong negative correlation between the two variables.
5.
FLASHCARD QUESTION
Front
How do you make a prediction using the regression line?
Back
You plug in a value for x and simplify to find the corresponding y-hat.
6.
FLASHCARD QUESTION
Front
What is a positive correlation?
Back
A positive correlation means that as one variable increases, the other variable also increases.
7.
FLASHCARD QUESTION
Front
What is a negative correlation?
Back
A negative correlation means that as one variable increases, the other variable decreases.
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