stats 10 quiz 5

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University of California, Los Angeles *

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10

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Statistics

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Feb 20, 2024

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pdf

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2/20/22, 12:01 PM Quiz 5: 22W-STATS-10-LEC-4 Introduction to Statistical Reasoning https://bruinlearn.ucla.edu/courses/79251/quizzes/780949 1/8 Quiz 5 Due Feb 11 at 11:59pm Points 10 Questions 10 Time Limit None Instructions Attempt History Attempt Time Score LATEST Attempt 1 13 minutes 10 out of 10 Score for this quiz: 10 out of 10 Submitted Feb 11 at 12:36pm This attempt took 13 minutes. General Quiz Information The purpose of this quiz is to help you check your understanding of Week 6 materials . The quiz is not timed and it's open book/notes. You must complete and submit your answers for each quiz by the due date. Please work on the quiz independently. If you experience a technical problem that interferes with your ability to complete a quiz during the specified time, contact your instructor as soon as possible—you don't have to wait until the quiz has closed 1 / 1 pts Question 1 Which of the following is an example of a disjoint/mutually exclusive event? The selected person only drinks water; the selected person drinks coffee.
2/20/22, 12:01 PM Quiz 5: 22W-STATS-10-LEC-4 Introduction to Statistical Reasoning https://bruinlearn.ucla.edu/courses/79251/quizzes/780949 2/8 The selected students is a biology major; the selected student is taking a statistics class. The selected student works off campus; the selected student does not have a job. Correct! Correct! The selected student is an English major; the selected student speaks French. Your answer is correct. 1 / 1 pts Question 2 Suppose that for American households with pets, 45% owned a dog, 34% owned a cat, and 10% owned a bird. Assume that pet ownership is mutually exclusive. Suppose we select three households randomly, what is the probability that at least one of the three randomly selected households own a bird? (Round to the nearest hundredth) 0.73 0.08 0.92 0.27 Correct! Correct!
2/20/22, 12:01 PM Quiz 5: 22W-STATS-10-LEC-4 Introduction to Statistical Reasoning https://bruinlearn.ucla.edu/courses/79251/quizzes/780949 3/8 1 / 1 pts Question 3 Suppose for two events A and B, the probability of event A occurring is 0.2 and the probability of both events occurring is 0.18. Suppose A and B are independent, what is the probability of event B occurring? 0.16 0.36 0.9 Correct! Correct! Cannot be determined 1 / 1 pts Question 4 Which of the following statements is true about the "law of large numbers" (LLN)? If an experiment is repeated a large number of times, the empirical probability will be consistently different from the theoretical probability. If you repeat a random experiment many, many times, your outcomes should be a unique value that is different from the theoretical average. If you simulate an experiment that is designed correctly, the empirical probability will always be the same as the theoretical probability that is expected.
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