Question

A doctor wanted to determine whether there was a relation between age and HDL cholesterol. He randomly selected 5 patients and obtained the following data. Age HDL Cholesterol 49 27 52 38 45 40 57 25 25 85 25 65 HDL (b) Compute the linear correlation coefficient between age and HDL cholesterol. a) Draw a scatter diagram. b) Compute the linear correlation coefficient c) Comment of the type of relation that appears to exist. (Round to three decimal places as needed.) (c) Comment on the type of relation that appears to exist between age and HDL cholesterol on the basis of the scatter diagram and the linear correlation The linear correlation coefficient is close to | exists between age and HDL cholesterol. ▼ | so ▼ | linear relation

Answer 1

a)

Age	Cholestrol
49	55
27	45
52	40
38	57
44	28

For each pair (x,y) plot   or use excel /softwarre directly

right graph is correct

b)

r = correl(age, cholestrol)

= -0.13223

= -0.132

c)

linear correlation is close to 0

so there does not exist any linear relationship