Statistics 0.0 / 5 ? StatisticsCorrelationASEdexcel Created by: Former MemberCreated on: 23-02-14 13:25 Data going upwards from left to right close together Positive correlation 1 of 14 Data going upwards from right to left close together Negative correlation 2 of 14 No linear pattern seen No correlation 3 of 14 Where do the points lie on a positively correlated graph? 1st and 3rd quadrants 4 of 14 Where do the points lie on a negatively correlated graph? 2nd and 4th quadrants 5 of 14 Where do the points lie on a graph without linear correlation? Fairly evenly in all quadrants 6 of 14 Correlation coeffecient r (amount of correlation between two variables) 7 of 14 The closer to the value of 1 of r... the stronger the (positive) correlation 8 of 14 The closer to the value of 0 of r... the weaker the correlation 9 of 14 The closer to the value of -1 of r... the stronger the (negative) correlation 10 of 14 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. 11 of 14 Coded p= (x-a)/b 12 of 14 Coded q= (x-c)/d 13 of 14 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 14 of 14
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