WGU Applied Probability and Statistics (FZO1 C955) - Applied-Probability-and-Statistics FREE EXAM DUMPS QUESTIONS & ANSWERS]

Question 1

Uniform distribution 0-5: P(X < 3) = ?

A. 0.3 B. 0.6 C. 0.4 D. 0.5

Discussion 0

Correct Answer: B Vote an answer

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Question 2

Variance of Poisson # = 5 = ?

A. 1 B. 5 C. 0 D. 4

Discussion 0

Correct Answer: B Vote an answer

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Question 3

Probability of drawing red or black card = ?

A. 1/2 B. 0.25 C. 1 D. 0

Discussion 0

Correct Answer: C Vote an answer

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Question 4

68-95-99.7 rule: % within 1 SD?

A. 99% B. 50% C. 95% D. 68%

Discussion 0

Correct Answer: D Vote an answer

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Question 5

Z-score formula = ?

A. (x # # )/ # B. x/ # C. # / # D. (x + # )/ #

Discussion 0

Correct Answer: A Vote an answer

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Question 6

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?

A. 0.625 B. 0.25 C. 0.75 D. 0.50

Discussion 0

Correct Answer: A Vote an answer

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Question 7

One-sample t-test compares:

A. Variances B. Proportions C. Two independent samples D. Sample mean vs known population mean

Discussion 0

Correct Answer: D Vote an answer

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Question 8

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?

A. .59 B. .3 C. .4 D. .45

Discussion 0

Correct Answer: A Vote an answer

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Question 9

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?

A. Quantitative#categorical B. Categorical#quantitative C. Quantitative#quantitative D. Categorical#categorical

Discussion 0

Correct Answer: B Vote an answer

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Question 10

A teacher plots the test scores of a class using the box plot.

What is the interquartile range?

A. 18 points B. 22 points C. 8 points D. 10 points

Discussion 0

Correct Answer: A Vote an answer

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Question 11

Type II error # is:

A. Accept H# when false B. Reject H# when true C. 1 # # D. Sample error

Discussion 0

Correct Answer: A Vote an answer

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Question 12

Given a normal distribution with a mean of 40 and a standard deviation of 6, what is the range that contains approximately 95% of the data?

A. The range is from 28 to 52. B. The range is from 22 to 58. C. The range is from 30 to 50. D. The range is from 34 to 46.

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Correct Answer: A Vote an answer

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Question 13

What is the result of 2/5 + 1/3 # 1/4?

A. 29/60 B. 19/60 C. 13/60 D. 11/60

Discussion 0

Correct Answer: A Vote an answer

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