Linear Regression
Flashcard
•
Mathematics
•
8th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is Linear Regression?
Back
Linear Regression is a statistical method used to model the relationship between a dependent variable and one or more independent variables by fitting a linear equation to observed data.
2.
FLASHCARD QUESTION
Front
What does the equation y = mx + b represent?
Back
This is the slope-intercept form of a linear equation, where 'm' is the slope and 'b' is the y-intercept.
3.
FLASHCARD QUESTION
Front
How do you interpret the slope in a linear regression equation?
Back
The slope indicates the change in the dependent variable for each one-unit change in the independent variable.
4.
FLASHCARD QUESTION
Front
What is the purpose of predicting values using a linear regression equation?
Back
To estimate the value of the dependent variable based on known values of the independent variable.
5.
FLASHCARD QUESTION
Front
What does a Z-score represent?
Back
A Z-score indicates how many standard deviations an element is from the mean of the data set.
6.
FLASHCARD QUESTION
Front
What is the empirical rule in statistics?
Back
The empirical rule states that for a normal distribution, approximately 68% of the data falls within one standard deviation of the mean, 95% within two standard deviations, and 99.7% within three standard deviations.
7.
FLASHCARD QUESTION
Front
What does it mean if a Z-score is negative?
Back
A negative Z-score indicates that the value is below the mean.
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