BANA 2081 ACTUAL TEST 2 QUESTIONS & ANSWERS
The time required to load a truck is exponentially distributed with a mean of 30 minutes.
What is the probability that a truck will be loaded in 30 minutes or less. Enter your
answer as a decimal rounded to 3 decimal places. - Answer -.632
The table below is a discrete probability distribution.
x
0
1
2
3
P(x)
0.27
0.35
-0.06
0.44 - Answer -False
Smaller values of the standard deviation result in a normal curve that is - Answer -
narrower and more peaked
Two events, C and D, are mutually exclusive. P(C) =40% and P(D)=20%. What is the
conditional probability of D given C? In other words, calculate P (D|C). - Answer -0%
The probability that a continuous random variable takes any specific value - Answer -is
equal to zero
If the probability of getting an "A" on this exam is .30 and the probability of getting an "A"
as a final grade and on this exam is .25. What is the probability of getting an "A" as a
final grade given that you get an "A" on this exam? Round your answer to two decimal
places. - Answer -.83
Consider a discrete random variable x that can assume values 0, 1, and 2 with
probabilities 0.2, 0.5, and 0.3, respectively. What is the expected value of x? - Answer -
1.1
The sum of the probabilities of two complementary events is - Answer -1.0
The number of people arriving at an ATM can be described by a Poisson Distribution. It
is known that the mean number of arrivals in thirty minutes is 11.0. Determine the
probability that ten people or less arrive in 30 minutes. Enter your answer as a decimal
rounded to three places. - Answer -0.46
Bayes' theorem is used to compute - Answer -the posterior probabilities
The time required to load a truck is exponentially distributed with a mean of 30 minutes.
What is the probability that a truck will be loaded in 30 minutes or less. Enter your
answer as a decimal rounded to 3 decimal places. - Answer -.632
The table below is a discrete probability distribution.
x
0
1
2
3
P(x)
0.27
0.35
-0.06
0.44 - Answer -False
Smaller values of the standard deviation result in a normal curve that is - Answer -
narrower and more peaked
Two events, C and D, are mutually exclusive. P(C) =40% and P(D)=20%. What is the
conditional probability of D given C? In other words, calculate P (D|C). - Answer -0%
The probability that a continuous random variable takes any specific value - Answer -is
equal to zero
If the probability of getting an "A" on this exam is .30 and the probability of getting an "A"
as a final grade and on this exam is .25. What is the probability of getting an "A" as a
final grade given that you get an "A" on this exam? Round your answer to two decimal
places. - Answer -.83
Consider a discrete random variable x that can assume values 0, 1, and 2 with
probabilities 0.2, 0.5, and 0.3, respectively. What is the expected value of x? - Answer -
1.1
The sum of the probabilities of two complementary events is - Answer -1.0
The number of people arriving at an ATM can be described by a Poisson Distribution. It
is known that the mean number of arrivals in thirty minutes is 11.0. Determine the
probability that ten people or less arrive in 30 minutes. Enter your answer as a decimal
rounded to three places. - Answer -0.46
Bayes' theorem is used to compute - Answer -the posterior probabilities
