Stock Market Prices Do Not Follow Random Walks: Evidence from a Simple Specification Test Andrew W. Lo A. Craig MacKinlay University of Pennsylvania In this article we test the random walk hypothesis for weekly stock market returns by comparing variance estimators derived from data sampled at different frequencies. The random walk model is strongly rejected for the entire sample period (19621985) and for all subperiod for a variety of aggregate returns indexes and size-sorted portofolios. Although
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Random Acts of Kindness For our Random act of Kindness project we decided to surprise a teacher with flowers‚ candy‚ and pictures of her favorite animals. We chose Mrs. Adams because we all like her as a teacher and she was recently going through a hard time. I brought her some flowers‚ purchased some of favorite candy‚ and drew pictures of her favorite animals. During advisory we placed the gifts right by her door and knocked on her door. We then ran away and left the gifts as a surprise. Who
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Selected Answer: .5006 . Question 5 .5 out of 5 points An automotive center keeps tracks of customer complaints received each week. The probability distribution for complaints can be represented as a table or a graph‚ both shown below. The random variable xi represents the number of complaints‚ and p(xi) is the probability of receiving xi complaints. xi 0 1 2 3 4 5 6 p(xi) .15 .1 .28 .20 .10 .10 .07 What is the expected number of complaints received per week? Round
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provide the required estimates with associated margins of uncertainity‚ arising from examining only a part and not the whole. Methods of Sample Selection Simple Random Sampling In this method each item of the data ( population) has the same probability of being selected in the sample. The selection is usually made with the help of random numbers. * Suppose there are N=850 students in a school from which a sample of n=10 students is to be taken. The students are numbered from 1 to 850. Since our
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continuous random variable because the time is being measured. All possible results for the variable time (t) would be greater than > 0. b) The weight of a T-bone steak is a continuous random variable because the weight of the steak is measured. All the possible results for the weight of the T-bone steak would be positive numbers making the variable weight (w) > greater than 0. c) The number of free throw attempts before the first shot is made is a discrete random variable
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Australia Australia is the only country in the world that is also a continent. It is the sixth large country and the smallest continent. Australia lies between the South Pacific Ocean and the Indian Ocean. It is situated about 11 000 km southwest of North America and about 8200 km southeast of mainland Asia. The name of the country comes from Latin word «australis» which mean southern. The country’s official name is Commonwealth of Australia. The Commonwealth of Australia is a federation of
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Modelling 2 Week 3: Discrete Random Variables Stephen Bush Department of Mathematical Sciences MM2: Statistics - Week 3 - 1 Random Variables • Reference: Devore § 3.1 – 3.5 • Definitions: • An experiment is any process of obtaining one outcome where the outcome is uncertain. • A random variable is a numerical variable whose value can change from one replicate of the experiment to another. • Sample means and sample standard deviations are random variables • They are different
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Online HIST 1111F World Civilization I Final Essay Topics Prof. Wang @ Armstrong Select one topic from the list below and develop a short essay Due time: Sunday (12/5) 11:59pm ET Total points: 50 Requirements: 1. The essay must be typed and saved in either MS Word format (use Times New Roman font‚ 12pt size‚ double space). 2. Length: 2-4 pages. 3. It should have a formal title. 4. All direct quotes should be appropriately cited. Please use footnotes‚ not endnotes (if you don’t know about footnotes
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Hamlet Essay Guidelines: Length: 2000 words (give or take 200) Style: SemiFormal – proper grammar‚ spelling and sentence structure‚ academic word choice and diction‚ proper use of quotation integration‚ use of personal pronouns‚ contractions‚ and conversational tone allowed. Format: the essay must have a thesis (controlling idea) must be written in paragraphs each paragraph must contain one idea that is explored the proof must come from the text of Hamlet and cited in text and on the Works
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I currently write persuasive essays because I love to tell other people my opinion on topics and persuade them to be on my side of the topic. Sometimes the topics can be very hard to persuade someone to be on my side‚ but I like to make that a challenge that I have to convince them. I have also done narrative essays and I’ve enjoyed these types of writing since they’re experiences I’ve had and most of them are fun memories to look back at. I have two essays that I’ve done in high school that I’m
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