WGU Applied-Probability-and-Statistics Actual Free Exam Questions & Community Discussion
P(A) = 0.3, P(B) = 0.4, A and B independent. P(A and B) = ?
Correct Answer: A
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
In a game, a coin is tossed, and a spinner with 8 equal spaces numbered 1 through 8 is spun.
What is the probability of getting heads on the coin and a number less than 3 on the spinner?
What is the probability of getting heads on the coin and a number less than 3 on the spinner?
Correct Answer: C
Vote an answer
Boxplot shows:
Correct Answer: B
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
A biologist is studying the relationship between plant species, species A, species B, and species C, and the average height of the plants.
How should this study be classified?
How should this study be classified?
Correct Answer: D
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
Probability of rolling sum = 2 on 2 dice = ?
Correct Answer: D
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
Type I error = ?
Correct Answer: B
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
Sample correlation r = 0.6. R² = ?
Correct Answer: B
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
In a class of 40 students, the following data were collected on their favorite sport:
* Soccer: 10 students
* Basketball: 15 students
* Tennis: 5 students
* Swimming: 10 students
What is the relative frequency of students whose favorite sport is not basketball?
* Soccer: 10 students
* Basketball: 15 students
* Tennis: 5 students
* Swimming: 10 students
What is the relative frequency of students whose favorite sport is not basketball?
Correct Answer: B
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
There are 10 green, 20 yellow, and 15 purple marbles in a jar.
What is the probability of selecting 2 green marbles in a row and then 1 yellow marble, replacing the marble each time?
What is the probability of selecting 2 green marbles in a row and then 1 yellow marble, replacing the marble each time?
Correct Answer: D
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
In a class of 30 students, 18 are enrolled in a math course, and 12 are enrolled in a science course. Among the students enrolled in the science course, 8 are also enrolled in the math course.
What is the probability that a student is enrolled in the math course given that they are enrolled in the science course?
What is the probability that a student is enrolled in the math course given that they are enrolled in the science course?
Correct Answer: A
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
Standard deviation squared = ?
Correct Answer: C
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
A person has a .5 probability of taking a train to work, a .3 probability of carpooling, and a .2 probability of walking. The probability of being late is .2 when taking the train, .1 when carpooling, and .05 when walking.
What is the probability of taking the train and being on time, or walking and being on time?
What is the probability of taking the train and being on time, or walking and being on time?
Correct Answer: D
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
The average commute time for workers in a city in 2021 was 35 minutes, with a standard deviation of 5 minutes.
Assuming a normal distribution, which two values encompass 95% of the data?
Assuming a normal distribution, which two values encompass 95% of the data?
Correct Answer: D
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
0
0
0
10