__________ occurs between two variables when one tends to decrease as the other increases.

__________ occurs between two variables when one tends to decrease as the other increases.
 
  A) no association B) a curvilinear association
  C) a positive association D) a negative association

Q. 2

The number of road construction projects that take place at any one time in a certain city follows a Poisson distribution with a mean of 7. Find the probability that more than four road construction projects are currently taking place in the city.
 
  A) 0.827008 B) 0.081765 C) 0.918235 D) 0.172992

Q. 3

Based on this data, how many days out of 200 warm days would you expect to be cloudy?
 
  A) cannot determine B) 60 C) 120 D) .6

Q. 4

The number of road construction projects that take place at any one time in a certain city follows a Poisson distribution with a mean of 3. Find the probability that exactly six road construction projects are currently taking place in this city.
 
  A) 0.014936 B) 0.089235 C) 0.301168 D) 0.050409

Q. 5

For two events A and B, suppose P(A ) = 0.7, P(B) = 0.6, and P(A  B) = 0.5. Then P(A  B) = 0.8.
 
  Indicate whether the statement is true or false

Q. 6

What is the relative frequency of cloudy days that are cold?
 
  A) .4 B) .8 C) .2 D) .6