2022年澳洲AMC报名开启-比赛时间-澳洲AMC课程
说到数学类国际学术活动，相信不少人首先想到的一定是AMC，可其实你知道吗，除了众所周知的美国数学学术活动，澳洲也有一项AMC数学学术活动！ 澳洲AMC数学学术活动 澳洲AMC，即澳大利亚数学学术活动（Australian ...
CIE A Level Maths: Probability & Statistics 2复习笔记2.3.2 E(X) & Var(X) (Continuous)
E(X) & Var(X) (Continuous) What are E(X) and Var(X)? E(X)is the expected value, or mean, of a random variable X E(X) is the same as the population mean so can also be denoted by µ Var (X) is th...
CIE A Level Maths: Probability & Statistics 2复习笔记2.3.1 Probability Density Function
Calculating Probabilities using PDF What is a probability density function (p.d.f.)? For a continuous random variable , it is often possible to model probabilities using a function This function is...
CIE A Level Maths: Probability & Statistics 2复习笔记2.2.1 Linear Combinations of Random Variables
aX+b How are the mean and variance of X related to the mean and variance of aX + b? If a and b are constants then the following results are true E(aX + b) = aE(X) + b Var(aX + b) = a² Var(X) Note t...
CIE A Level Maths: Probability & Statistics 2复习笔记2.1.1 The Poisson Distribution
Properties of Poisson Distribution What is a Poisson distribution? A Poisson distribution is a discrete probability distribution What are the important properties of a Poisson distribution? The mea...
CIE A Level Maths: Probability & Statistics 2复习笔记1.2.3 Confidence Intervals
Confidence Interval for μ What is a confidence interval? It is impossible to find the exact value of a population parameter when taking a sample The best we can do is find an interval for which the...
CIE A Level Maths: Probability & Statistics 2复习笔记1.2.2 Distribution of Sample Means
Sample Mean Distribution What is the distribution of the sample means? For any given population it can often be difficult or impractical to find the true value of the population mean, µ The populat...
CIE A Level Maths: Probability & Statistics 2复习笔记1.2.1 Unbiased Estimates
Unbiased Estimates What is an unbiased estimator of a population parameter? An estimator is a statistic that is used to estimate a population parameter When a sample is used with the estimator, the...
2022年马歇尔学会经济论文比赛投稿本周截止，最后3天！
马歇尔学会经济论文比赛 距离投稿结束仅剩3 天！ 马歇尔学会经济论文比赛 马歇尔学会经济论文学术活动（Marshall Society Essay Competition）由英国剑桥大学经济学会举办，成立于1927年，该学术活动针对全球A Le...
