A statistical test is a formal technique‚ for arriving at a decision about the reasonableness of a hypothesis‚ based on some probability distribution. The test technique uses the values obtained from sample data to arrive at a probability statement about the hypothesis. But it also uses some assertions about the population from which the sample is drawn. Some of the important assumptions are like: Population is normally distributed Sample drawn is a random sample But in case of Non-parametric
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The Flynn Effect‚ first observed by James Flynn in 1981‚ is the steady year on year increase in IQ scores on intelligence tests‚ noting a greater rise in fluid (non-verbal) intelligence than crystallised (verbal) intelligence. There are numerous studies providing evidence for this effect leading to the question; are generations getting more intelligent? There is no universal definition of intelligence‚ leading many researchers to try and discover common themes around the world. Yang & Sternberg (1997b)
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Efficient Market Hypothesis v’s Behavioural Finance An efficient market is one in which share prices quickly and fully reflect all available information‚ where investors are rational‚ and there are no frictions. Investors determine stock prices on the basis of expected cash flows to be received from a stock and the risk involved. Rational investors should use all the information they have available or can reasonably obtain‚ including both known information and beliefs about the future. In an efficient
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One- and Two-Sample Tests of Hypothesis‚ Variance‚ and Chi-squared Analysis Problem Sets • Exercises 19 and 20 (Ch. 17) Chapter 10 31. A new weight-watching company‚ Weight Reducers International‚ advertises that those who join will lose‚ on the average‚ 10 pounds the first two weeks with a standard deviation of 2.8 pounds. A random sample of 50 people who joined the new weight reduction program revealed the mean loss to be 9 pounds. At the .05 level of significance‚ can we conclude that those
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Bumpbie is experiencing high turnover rates and should be very concerned. The company is struggling to retain employees and therefore has to find methods to manage this turnover. Paul needs to realize that this turnover is costly to the company‚ reduces overall performance‚ and can become difficult to manage correctly (Allen‚ 2008‚ p. 2). There are several things Bumpbie can do to improve the retention and turnover rate. The first step for Paul is to create a plan to manage retention‚ conduct
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High School involves much more responsibility than junior high school‚ because the teacher expect much more than your previous ones. From my experience i’ve had to use an agenda to write down my homework‚ get to class on time‚ and most importantly come prepared to school. So if you want to be successful during your high school career‚ you have to make major differences to your regular middle school routine. Let me start off by saying what you should do on a daily basis during your first year of
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human curiosity about the world and has played a central role in the development of the modern world. Chemistry is the study of the composition of matter‚ the stuff things are made of‚ and the changes that matter undergoes. Now‚ we may not think chemistry plays such a big role in our life but it perhaps more than any other branch of science has bettered our lives. Almost anything we touch today has benefited from chemical technology‚ and there for chemistry has had a huge influence on human life.
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At the .05 level of significance‚ can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p-value. Answer: H0: = 10 pounds H1: < 10 pounds Reject the null hypothesis if Z < -1.65 9.0 – 10.00 Z= ---------------- = -2.53 2.8/sqrt(50) The null hypothesis is rejected‚ the average weight loss is less than 10 pounds. p-value = .5000 - .4943 = .0057 32. Dole Pineapple‚ Inc. is concerned that the 16-ounce can of
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Efficient Market Hypothesis And Behavioral Finance – Is A Compromise In Sight? By Nikolai Chuvakhin Legend has it that once upon the time two economists were walking together when one of them saw something that struck his mind. “Look‚” he exclaimed‚ “here’s a great research topic!” “Nonsense‚” the other one said‚ “If it were‚ someone would have written a paper on it by now.” For a long time this attitude governed the view of economists toward the stock market. Economists simply believed that
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The Rival By Martin Armstrong The train was about three-quarters of an hour from its destination and was travelling at a good sixty miles an hour when Mr. Harraby-Ribston‚ a prosperous businessman‚ rose from his seat‚ lifted his suitcase down from the rack and threw it out of the window. The only other occupant of the carriage‚ a small‚ thin man‚ a Mr. Crowther‚ had raised his eyes from his book when his travelling-companion stirred from his seat and had noticed the occurrence. Then the two men
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