Regression Review

Linear Regression

100

Describe r= -0.9

Negative strong association

200

Describe  r = 0.2

Weak Positive association

300

True/False

r value is always positive

False

400

describe r = -0.1

Weak negative association

500

Which one is strong and which is weak ? 

r = 0.25       and   r= 0.7

r = 0.7 is stronger 

Linear Regression

100

Describe r= -0.19

Weak Negative Association

200

What is the linear regression formula? 

y = mx +b

300

What is the slope of the following equation ? 

y = -2x + 5

slope = -2

400

Which one is stronger ? 

r = -0.15 and r = -0.5

r = -0.5

500

Given the following values,

m = -0.569

b = 17.3

predict the value of y when x = 12

y = 10.472