Question 1: State the null hypothesis and alternative hypothesis ONLY i) One of the major Malaysia tire makers wishes to review its warranty for their rainmaker tire. The warranty is for 40‚000 kilometers. The tire company believes that the tire actually lasts more than 40‚000 kilometers. A sample 49 tires revealed that the mean number of kilometers is 45‚000 kilometers with a standard deviation of 15‚000 kilometers. What is the null hypothesis and alternative hypothesis? ii) It is claimed that
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considers committing suicide‚ this is a tragedy. The tragedy suicide is the third leading cause of death among young people ages 15-24. Suicide is the second leading cause of death among college students. This paper attempts to list theories and hypothesis testing the theories of suspecting factors leading to the cause of teen suicide. Statistics and research methods applied indicate that the mortality rate is different among states. One theory is true‚ that teen suicide is on the rise. Theory
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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 the rejections are due largely to the behavior of small stocks‚ they cannot be attributed completely to the effects of infrequent trading or timevarying
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drift‚ Unpublished manuscript‚ College of Business Ahrony‚ Joseph and Itzhak Swary‚ 1980‚ Quarterly dividend and earnings announcements and stockholders ’ returns: An empirical analysis‚ Journal of Finance 35‚ 1-12. Ariel‚ Robert A.‚ 1987‚ A monthly effect in stock returns‚ Journal of Financial Economics 18‚ 161-174. ‚ 1990‚ High stock returns before holidays: Existence and evidence on possible causes‚ Journal of Finance 45‚ 1611-1626. Asquith‚ Paul‚ 1983‚ Merger bids‚ uncertainty and stock holder returns
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The Primordial Soup Hypothesis‚ otherwise known as "The Primordial Soup Theory‚" was developed by the Russian chemist A.I. Oparin and English geneticist J.B.S. Haldane. Oparin & Haldane(1920) formed this idea separately though. In this theory‚ the basic aspects of life all came from simple molecules that formed in the atmosphere with the addition of oxygen. They believed that Earth had a chemically reducing atmosphere. This produced monomers. These monomers formed a "soup‚" that developed organic
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The dopamine hypothesis evolved from animal studies conducted in the 1960s showing that neuroleptic drugs blocked dopamine receptors in the brain. An article by van Rossum published in 1966 is often cited as the first expression of the dopamine theory of schizophrenia‚ but in fact‚ the article concerned only the mode of action of neuroleptic drugs. It stated: “The hypothesis is therefore put forward that dopamine receptor blockade is an important factor in themode of action of neuroleptic drugs
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intellectual improvement and individual contrasts have a major impact in the way youngsters create in spite of the fact that kids go through similar ages *Background of Intellectual hypothesis The principal precise hypothesis of intellectual advancement was proposed by Jean Piaget (1896-1980). Piaget’s hypothesis is a standout amongst the most intensive records offered regarding intellectual advancement as he was occupied with how youngsters learn and adjust to the world. He believed that all
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The Red Queen Hypothesis The Red Queen Hypothesis was formulated by Van Valen in 1973‚ and its original purpose was to give an understanding of the adaptation dynamics between species (Vermeij and Roopnarine‚ 2013). The principles of The Red Queen Hypothesis is clearly formulated in McCune (1982)‚ that states ”all taxa are running on a treadmill powered by an environment which deteriorates at a stochastically constant rate. The result is that an ancient taxon is no better adapted than a younger
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Semantic transfer hypothesis According to the semantic transfer hypothesis‚ the semantic content residing in L2 word is transferred from their L1 translations. A clear understanding of the process is required for any attempt to develop a theory of vocabulary acquisition. One of the issues that has received the most attention is how the two languages of bilingual speaker are connected to each other and to conceptual representations. It is often assumed that L2 learners acquire new meanings while
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just testing Compare and Contrast the approaches of Marx and Weber to Social Class and Stratification Social Stratification refers to the hierarchically organised layers of social inequality Such as status groups‚ classes and ranks. Two of the most well known sociologists Max Weber (1864-1920) and Karl Marx (1818-1883) studied the concepts of stratification and class in great detail‚ many of their ideas still have profound influences on people studying sociology today‚ in this‚ the modern
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