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Ashworth College *

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Statistics

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Jan 9, 2024

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docx

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11

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[05] Module 5 Quiz - Results Attempt 1 of 2 Written Dec 13, 2023 7:30 AM - Dec 13, 2023 10:30 AM Attempt Score 75 / 100 - 75 % Overall Grade (Highest Attempt) 75 / 100 - 75 % Question 1 5 / 5 points A lot of 10 components contains 3 that are defective. Two components are drawn at random and tested. Let A be the event that that the first component drawn is defective, and B be the event that the second component drawn is defective. a. Find P ( A ). b. Find P ( B | A ). c. Find P ( A and B ). d. Are A and B independent? Question options: a. 0.3000 b. 0.3333 c. 0.1000 d. No a. 0.3333 b. 0.1250 c. 0.1000
d. Yes a. 0.3000 b. 0.2222 c. 0.0667 d. Yes a. 0.3000 b. 0.2222 c. 0.0667 d. No Question 2 0 / 5 points Nanette must pass through three doors as she walks from her company's foyer to her office. Each of these doors may be locked or unlocked. Let C be the event that at least two doors are unlocked. List the outcomes of C . [Let "L" designate "locked" and "U" designate "unlocked".] Question options: {LLL, LLU, LUL, LUU, ULL, ULU, UUL, UUU} {UUU, LUU, ULU, UUL} {LLU, LUL, ULL, LUU, ULU, UUL} None of these. Question 3 5 / 5 points If P ( A ) = 0.43, P ( B ) = 0.21, and P ( A or B ) = 0.64, are A and B mutually exclusive? Question options: Yes No Question 4 0 / 5 points
A poll was taken of 13,795 working adults aged 40-70 to determine their level of education. The participants were classified by sex and by level of education. The results were as follows. Total 7,208 6,587 13,795 A person is selected at random. Compute the probability that the person has a master's degree. Question options: 0.041 0.036 0.073 0.032 Question 5 5 / 5 points Let A and B be events with P ( A ) = 0.3, P ( B ) = 0.2, and P ( A and B ) = 0.06. Are A and B independent? Question options: No Yes Question 6 0 / 5 points What is the correct relationship between events A and B? A: Karl is college graduate. B: Karl is a high school graduate. Question options:
A and B are mutually exclusive. B is the complement of A. A and B are not mutually exclusive. If B is not true, A cannot be true. Question 7 5 / 5 points The numbers 1 through 7 are written in separate slips of paper, and the slips are placed into a box. Then, 4 of these slips are drawn at random. What is the probability that the drawn slips are "1", "2", "3", and "4", in that order? Question options: 0.68568 0.00119 0.02857 0.02856 Question 8 5 / 5 points On a TV game show, a contestant is shown 11 products from a grocery store and is asked to choose the three least-expensive items in the set. The three chosen items need not be in any particular order. In how many ways can the contestant choose the three items? Question options: 6 165 6,652,800 990
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