Card 1 of 21
In X∼B(n,p)X\sim\operatorname{B}(n,p)X∼B(n,p), what does XXX count?
A
A common normal-approximation check is that both npnpnp and nqnqnq are at least 5.
B
p=0.5p=0.5p=0.5, when success and failure are equally likely.
C
nqnqnq.
D
The number of successes in nnn trials.
Card 1 of 21
2.4.4 Mean and variance of the binomial (A-level only) Flashcards
21 flashcards on OCR A Level Maths 2.4.4 Mean and variance of the binomial (A-level only): the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.