QMI1500-ELEMENTARY
QUANTITATIVE METHODS
EXAM 4
Non-linear (or Curvilinear) correlation
Pattern of dots is curved, not in a straight line (relationships aren't a straight line)
Linear Correlation
Describes a situation where the pattern of dots falls roughly in a straight line
No correlation
As X increases, Y doesn't change consistently (no systematic pattern)
, Positive correlation
As X increases, Y also increases (pattern of dots go up from left to right)
Negative correlation
As X increases, Y decreases (pattern of dots go down from left to right)
correlation is zero
- No correlation: r = 0
- Zero represents no correlation (meaning no relationship)
- that there is no relationship between the two variables
- no linear correlation
***Know how to calculate a correlation coefficient
r=EZxZy/N
When do we have a positive correlation and when do we have a negative correlation
QUANTITATIVE METHODS
EXAM 4
Non-linear (or Curvilinear) correlation
Pattern of dots is curved, not in a straight line (relationships aren't a straight line)
Linear Correlation
Describes a situation where the pattern of dots falls roughly in a straight line
No correlation
As X increases, Y doesn't change consistently (no systematic pattern)
, Positive correlation
As X increases, Y also increases (pattern of dots go up from left to right)
Negative correlation
As X increases, Y decreases (pattern of dots go down from left to right)
correlation is zero
- No correlation: r = 0
- Zero represents no correlation (meaning no relationship)
- that there is no relationship between the two variables
- no linear correlation
***Know how to calculate a correlation coefficient
r=EZxZy/N
When do we have a positive correlation and when do we have a negative correlation
