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A discrete random variable can take only [ ], with gaps between them.
A
When p=0.5p=0.5p=0.5, a binomial distribution is symmetric.
B
A discrete random variable can take only separate, countable values, with gaps between them.
C
P(X>r)=1−P(X≤r)\boldsymbol{P(X>r)=1-P(X\le r)}P(X>r)=1−P(X≤r)
D
- A fixed number of trials
- Exactly two outcomes per trial
- Trials are independent
- Success probability ppp is constant
- XXX counts the number of successes
Card 1 of 22
2.7.1 Statistical distributions Flashcards
22 flashcards on CCEA A Level Maths 2.7.1 Statistical distributions: the key formulae, methods and definitions you need to recall for AS 1, AS 2, A2 1 and A2 2.