Linear Regression
Describe r= -0.9
Negative strong association
Describe r= -0.19
Weak Negative Association
Describe r = 0.2
Weak Positive association
What is the linear regression formula?
y = mx +b
True/False
r value is always positive
False
What is the slope of the following equation ?
y = -2x + 5
slope = -2
Weak negative association
Which one is stronger ?
r = -0.15 and r = -0.5
r = -0.5
Which one is strong and which is weak ?
r = 0.25 and r= 0.7
r = 0.7 is stronger
Given the following values,
m = -0.569
b = 17.3
predict the value of y when x = 12
y = 10.472