Chapter #10b - 11/04/24

Question 1

The regression line for body fat index (bfi) as a function of tricep thickness (in mm) is given below.

bfi = 14.59 + (0.74 × triceps thickness)

Predict the bfi for individuals with tricep thickness of 35 mm.

a) 15.33
b) 49.59
c) 40.49
d) 25.9

Answer 1

c) 40.49

Question 2

The regression line for body fat index (bfi) as a function of tricep thickness (in mm) is given below.

bfi = 14.59 + (0.74 × triceps thickness)

What is the average amount by which bfi changes when tricep thickness increases by 1 mm?
a) 1.48
b) 14.59
c) 14.59 + 0.74
d) 0.74

Answer 2

d) 0.74

Question 3

in y = ax + b … if we see a + b, what direction is the line moving ?

Answer 3

increasing (moving up)

Question 4

in y = ax - b … if we see a - b, what direction is the line moving ?

Answer 4

decreasing (moving down)