Question 17 of 20
1.0/ 1.0 Points
There are on average 20 old growth Sitka Spruce trees per acre in a local forest. Find the
probability that that there are more than 8 Sitka Spruce trees in a ¼ acre. Round answer to 4

=1-POISSON.DIST(8,5,TRUE)
Question 18 of 20
1.0/ 1.0 Points
The mean number of visitors at a national park in one weekend is 55. Assume the variable
follows a Poisson distribution. Find the probability that there will be at most 49 visitors at this

Part 6 of 6 - Probability
1.0/ 2.0 Points
Question 19 of 20
1.0/ 1.0 Points
If A and B are any two events with P(A) = .8 and P(B|A) = .4, then the joint probability of A and
B is:

D.
0.40
Answer Key:A
Feedback:
P(B|A) =
.8 =
.8*.4 = P(A and B)
Question 20 of 20
0.0/ 1.0 Points
A gumball machine contains 350 grape flavored balls, 400 cherry flavored balls, and 550 lemon
flavored balls. What is the probability of getting 1 grape ball, 1 cherry ball, and 1 lemon ball if
each ball was removed and then replaced before choosing the next from the machine?

C.
0.0350
D.
0.0347
Answer Key:C
Feedback:
(350/1300)*(400/1300)*(550/1300)
Part 1 of 6 - Binomial Distribution
4.0/ 5.0 Points
Question 1 of 20
1.0/ 1.0 Points
Approximately 8% of all people have blue eyes. A random sample of 20 people is selected, find

Question 2 of 20
1.0/ 1.0 Points
If random variable X has a binomial distribution with n =7 and P(success) = p =0.6, find the

Question 3 of 20
0.0/ 1.0 Points
A coin is flipped 30 times. What is the probability of getting 15 or more heads? Round answer to

Question 4 of 20
1.0/ 1.0 Points
Suppose a random variable, x, arises from a binomial experiment. If n = 14, and p = 0.13, find

Question 5 of 20
1.0/ 1.0 Points
A coin is flipped 30 times. What is the probability of getting exactly 15 heads? Round answer to

Part 2 of 6 - Contingency Tables
1.0/ 1.0 Points
Question 6 of 20
1.0/ 1.0 Points
The table of data obtained from shows hit information
for four well known baseball players. Suppose that one hit from the table is randomly selected.
NAME
Single
Double
Triple
Home Run
TOTAL HITS
Babe Ruth
1,517
506
136
714
2,873