Unit 7: Correlation and regression Flashcards
1
Q
Which is more reliable interpolation or extrapolation?
A
Interpolation
2
Q
What is interpolation?
A
When the value you are estimating is within the data range.
3
Q
What is extrapolation?
A
When the value you are estimating is outside of the data range.
4
Q
What’s the equation for a regression line?
A
y=a+bx
5
Q
What does a mean?
A
Value of y when x=0
6
Q
What does b mean?
A
The gradient of the line
7
Q
What values can r take?
A
Between -1 and 1
8
Q
What does a confounded mean?
A
The correlation between two variables doesn’t mean one causes another (causation). Eg shark and ice cream
Actually linked by high temp
9
Q
What axis is the vertical line?
A
y
10
Q
What axis is the horizontal line?
A
x
