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Data going upwards from left to right close together
Positive correlation
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Data going upwards from right to left close together
Negative correlation
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No linear pattern seen
No correlation
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Where do the points lie on a positively correlated graph?
1st and 3rd quadrants
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Where do the points lie on a negatively correlated graph?
2nd and 4th quadrants
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Where do the points lie on a graph without linear correlation?
Fairly evenly in all quadrants
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Correlation coeffecient
r (amount of correlation between two variables)
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The closer to the value of 1 of r...
the stronger the (positive) correlation
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The closer to the value of 0 of r...
the weaker the correlation
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The closer to the value of -1 of r...
the stronger the (negative) correlation
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Does coding (adding to x or dividing the result) affect r?
No. Subtracting from x only moves the x axis and dividing only changes the scale.
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Coded p=
(x-a)/b
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Coded q=
(x-c)/d
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First find a and c (the subrtraced number)...
...then find b and d (the divisor) which is he number which is a common divisor of the numbers left after the divisor
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Other cards in this set

Card 2

Front

Negative correlation

Back

Data going upwards from right to left close together

Card 3

Front

No correlation

Back

Preview of the back of card 3

Card 4

Front

1st and 3rd quadrants

Back

Preview of the back of card 4

Card 5

Front

2nd and 4th quadrants

Back

Preview of the back of card 5
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