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此概念图以 IHMC CmapTools 创建, 内含信息有关于: Probability distribution, 1.each trial has only two outcomes:Success or failure 2.the two outcomes are mutually exclusive 3.the probability of success, p, is constant 4.successive trials are independent ???? <math xmlns="http://www.w3.org/1998/Math/MathML"> <mrow> <mtext> Normal aooroximation to the Binomial:
U=np
σ= </mtext> <msqrt> <mtext> npq </mtext> </msqrt> </mrow> </math>, The Poisson distribution is usually used to approximate a binomial distribution when: 1.n is large (say greater than 20) 2.p is very small (say pɘ.1) 3.np is less than 5 ???? A possion distribution is described, Probability distribution ???? Poisson distribution, Probability distribution ???? Binomionial distribut, <math xmlns="http://www.w3.org/1998/Math/MathML"> <mrow> <mtext> Standardizing will allow us to calculate the area under the curve
Z = the number of standard deviations from the mean


Z={Xi-u}/σ=
 </mtext> <mfrac> <mtext> Value of variable-Arithmetic mean </mtext> <mtext> Standard deviation </mtext> </mfrac> <mtext> 
 </mtext> </mrow> </math> ????, Poisson distribution ???? The Poisson distribution is usually used to approximate a binomial distribution when: 1.n is large (say greater than 20) 2.p is very small (say pɘ.1) 3.np is less than 5, Probability distribution ???? Standard normal distribution, 1.each trial has only two outcomes:Success or failure 2.the two outcomes are mutually exclusive 3.the probability of success, is constant 4.successive trials are independent ???? A possion distribution is described, Bell Shaped Symmetrical about the mean Area under the curve = 1 Curve never touches the X axis Theoretically it extends from -¥ to +¥ ???? ????, Standard normal distribution ???? <math xmlns="http://www.w3.org/1998/Math/MathML"> <mrow> <mtext> Standardizing will allow us to calculate the area under the curve
Z = the number of standard deviations from the mean


Z={Xi-u}/σ=
 </mtext> <mfrac> <mtext> Value of variable-Arithmetic mean </mtext> <mtext> Standard deviation </mtext> </mfrac> <mtext> 
 </mtext> </mrow> </math>, Binomionial distribut ???? 1.each trial has only two outcomes:Success or failure 2.the two outcomes are mutually exclusive 3.the probability of success, p, is constant 4.successive trials are independent, 1.each trial has only two outcomes:Success or failure 2.the two outcomes are mutually exclusive 3.the probability of success, p, is constant 4.successive trials are independent ???? If there are n items and r are to be selected irrespectiv of order, 1.Draw a diagram 2.Calculate the Z statistic 3.When Z ɬ,the comesponding value represents the probability when X>Xi occurs 4.When Zɘ,the corresponding value represents the probability when X≤Xi ????, Poisson distribution ???? 1.each trial has only two outcomes:Success or failure 2.the two outcomes are mutually exclusive 3.the probability of success, is constant 4.successive trials are independent, Probability distribution ????, Normal distribution ???? Bell Shaped Symmetrical about the mean Area under the curve = 1 Curve never touches the X axis Theoretically it extends from -¥ to +¥, Probability distribution ???? Normal distribution, 1.each trial has only two outcomes:Success or failure 2.the two outcomes are mutually exclusive 3.the probability of success, p, is constant 4.successive trials are independent ????