1、Chapter 5 Normal DistributionIntroduction to continuous probability distributionsNormal distribution and its general features Standard normal distributionThe applications of normal distributionsSection 1- Introduction to continuous probability distributions【 EXAMPLE1】 The weight of 1402 pregnant wom
2、en was measured.TABLE 2.1 The frequency distribution of weight from 1402 pregnant womenweightProbability densityType of graph Y axisFrequency distribution graph fhistogram f/iProbability density f/i nf frequencyi interval width in frequency distribution tablen sample sizeSection 2-normal distributio
3、n and its general featuresWhen the class intervals become more and more finer, the peak line of histogram will turn into a smooth curve . This is normal distribution.The area under normal curve is 1, because the cumulative percentage is 1.The characteristics of this family of curves were developed by Abraham de Moivre and karl Friedrich Gauss， so also called Gaussian distribution.
