【正文】 ere the normal curve was used. The normal distribution is often a good approximation to a discrete distribution when the latter takes on a symmetric bell shape. From a theoretical point of view, some distributions converge to the normal as their parameters approach certain limits. The normal distribution is a convenient approximating distribution because the cumulative distribution function is so easily tabled. 54 Other Continuous Probability Distributions ? 541 Vocabularies 詞匯 ? 542 Main Content 主要內(nèi)容 ? 543 Terminologies 專業(yè)詞匯 ? 544 After school extend 課外擴(kuò)展 ? 545 Literature 文獻(xiàn)導(dǎo)讀 541 Vocabularies ? elapse ? To slip by。為該畜牧業(yè)區(qū)中的工業(yè)中心。 ? Eg. The goods will be forwarded to you in the next week. 貨物將于下周發(fā)運(yùn)給你方。 ? printer(印刷工，打印機(jī) )。s。)2] = ? Binominal distribution ? Mean E(x)=np ? Variance s2=npq ()xp x?2( ) ( )x p x???513 Terminologies ? Discrete random variable ? Binomial probability distribution ? Continuous random variable ? Counting rule for binations ? Binomial formula 513 Terminologies ? Expected value of a discrete random variable ? Expected value of a binomial distribution ? Standard deviation of a discrete random variable ? Standard deviation of the binomial distribution 514 After school extend ? catalog sales ? Usbio introduction 52 Other Discrete Probability Distributions ? 521 Vocabularies 詞匯 ? 522 Main Content 主要內(nèi)容 ? 523 Terminologies 專業(yè)詞匯 ? 524 After school extend 課外擴(kuò)展 521 Vocabularies ? Vermont ? A state of the northeast United States bordering on Canada. It was admitted as the 14th state in 1791. Explored by Samuel de Champlain in 1609, the region was first permanently settled by the British in 1724. Claims to the area were relinquished by Massachusetts in 1781, New Hampshire in 1782, and New York in 1790. Montpelier is the capital and Burlington the largest city. Population, 564,964. ? 佛蒙特州：美國東北部的一個(gè)州，與加拿大接壤。 ? blood pressure(血壓 )。 in some manner: 表示“類似”：在某種程度上；在某種意義上 ? item ? （ 1） A single article or unit in a collection, an enumeration, or a series. ? 項(xiàng)目，細(xì)目：文集、細(xì)目或一套中的單獨(dú)條目或項(xiàng)目 ? （ 2） A clause of a document, such as a bill or charter. ? 條款：文件中的條款，例如一個(gè)議案或者是一個(gè)章節(jié) ? （ 3） An entry in an ? （ 4） A bit of information。 ：放下腳步；踏步 ? （ 3） The part of a wheel or tire that makes contact with the road or ：車輪或輪胎與路面或軌道接觸的部分 ? （ 4） The part of a shoe sole that touches the ：鞋底接觸地面的部分。CHAPTER 5: Discrete and Continuous Probability Distributions to acpany Business Statistics : A DecisionMaking Approach 6th edition, by David Chapter 5 Learning Objectives ? Distinguish between discrete and continuous random variables. ? Differentiate between the binomial and the Poisson discrete probability distributions and their applications. ? Be able to discuss the important properties of the normal probability distribution. ? Recgonize situations in which the uniform and exponential distributions apply. distributions discrete continuous normal binomial poisson uniform hypergeometirc exponential 51 The Binomial Probability Distribution 52 Other Discrete Probability Distributions 53 The Normal Probability Distribution 54 Other Continuous Probability Distributions 51 The Binomial Probability Distribution ? 511 Vocabularies 詞匯 ? 512 Main Content 主要內(nèi)容 ? 513 Terminologies 專業(yè)詞匯 ? 514 After school extend 課外擴(kuò)展 511 Vocabularies ? strain （ 1） The collective descendants of a mon ancestor。 ；走 ? （ 2） To set down the foot。 專心地 (做 ) ? be involved with 涉及； bee involved in 卷入 , 陷入； get involved with 給 ...纏住 ? Eg. The matter is serious because it involves your reputation. He was involved in working out a plan. 511 Vocabularies ? quasi ? To some degree。 ? side effects(副作用 )。 = E(x) = – Variance: s2 = E[(x – 181。人口 564,964 521 Vocabularies ? downsize ? vt. To make in a smaller size減小 (汽車的尺寸 , 重量和耗油量 ) ? cars that were downsized during the gasolineconscious 197039。 ? vending machine(自動(dòng)售貨機(jī) ,自動(dòng)販賣機(jī) )。 ? 注： forward還可做運(yùn)輸 , 運(yùn)送 , 寄送解。人口 38,053 ? (2)A city of westcentral Texas westsouthwest of Abilene. It is an industrial center in a cattleranching area. Population, 89,443. ? 米德蘭：美國得克薩斯州中西部一城市，位于艾伯林西南偏西。( 1 2 ) ( 1 1 .5 1 2 .5 ) 0 .1 0 5 2( 1 3 .5 ) 0 .8 7 9 0f P xPx? ? ? ??? 533 Terminologies 534 After school extend ? about normal distribution（翻譯） ? The most important continuous probabilities distribution in the entire field of statistics is the normal distribution. Its graph, called the normal curve, is the bellshaped curve of figure , which describes approximately many phenomena that occur in nature, industry, and research. Physical measurements in areas such as meteorological experiments, rainfall studies, and measurements of manufactured parts are often more than adequately explained with a normal distribution. 534 After school extend ? about normal distribution（接前頁） ? In addition, errors in scientific measurements are extremely well approximated by a normal distribution. In 1733, Abraham Demoivre developed the mathematical equation of the normal curve. It provided a basis for which much of the theory of inductive statistics