Normal Approximation of Poisson When can I use a normal distribution to approximate a Poisson distribution? The greater the value of?λ?in a Poisson distribution, the more symmetrical the distributi...
Choosing Distributions When should I use a Poisson distribution? A random variable that follows a?Poisson distribution?is a?discrete random variable A Poisson distribution is used when the random v...
Continuous Uniform Distribution What is meant by the continuous uniform distribution? This is a special case of a probability density function for a continuous random variable The?normal?distributi...
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...
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...
三大國(guó)際課程體系內(nèi)AP，ALEVEL，IB課程中，IB體系無(wú)疑是全球公認(rèn)最難的國(guó)際課程體系之一，所以選課就尤為重要了，特別是在進(jìn)入IBDP階段。選課這關(guān)沒把好，會(huì)直接影響到IB大考的分?jǐn)?shù)和申請(qǐng)結(jié)果。那么申英VS申美，I...
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...
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...
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...
