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Card 1 of 23

For any discrete random variable, the sum of all probabilities is: [...]\text{[...]}[...].

A

NpNpNp

B

For any discrete random variable, the sum of all probabilities is: ∑P(X=x)=1\boxed{\sum P(X=x)=1}∑P(X=x)=1​.

C

The probability of exactly rrr successes in a binomial distribution is P(X=r)=(nr)pr(1−p)n−rP(X=r) = \boxed{\binom{n}{r}p^r(1-p)^{n-r}}P(X=r)=(rn​)pr(1−p)n−r​.

D
  • nnn: number of trials
  • ppp: probability of success

Card 1 of 23

Statistical Distributions Flashcards

  1. A Level
  2. /Maths
  3. /Statistical Distributions

23 flashcards on Edexcel A Level Maths Statistical Distributions: the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.

Flashcards