Which association best describes the data in the table?
variable x 12 18 16 8 9 5 10 14 11
variable y 63 100 88 30 36 17 47 72 52
a.
negative linear association
b.
negative nonlinear association
c.
positive linear association
d.
positive nonlinear association

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?