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What must the total area under a probability density curve equal?

A

The total area is 1.

B

Z\fsimN(0,1)Z\fsim N(0,1)Z\fsimN(0,1).

C

It moves the centre of the distribution.

D

For a continuous random variable, P(X<a)=P(X\flea)\boxed{P(X<a)=P(X\fle a)}P(X<a)=P(X\flea)​ because an endpoint has zero probability.

Card 1 of 20

4.2 Statistical distributions (A-level only) Flashcards

  1. A Level
  2. /Maths
  3. /4.2 Statistical distributions (A-level only)

20 flashcards on WJEC A Level Maths 4.2 Statistical distributions (A-level only): the key formulae, methods and definitions you need to recall for AS Unit 1, AS Unit 2, A2 Unit 3 and A2 Unit 4.

Flashcards