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2.4 N: Statistical distributions

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Question 1

67%

A discrete random variable $X\,$ has the probability function:


$x$	0	1	2	3
$P (X = x)$	0.2	$a$	0.3	0.25

Find the value of $a$

[1]

Find $P (X > 1.2)$

[1]

Construct a table for the cumulative distribution $F (x)$

[2]

Markscheme

2.4 N: Statistical distributions Questions

A Level
Maths
2.4 N: Statistical distributions

390 exam-style questions on AQA A Level Maths 2.4 N: Statistical distributions, covering 2.4.1 Discrete distributions and the binomial, 2.4.2 The Normal distribution (A-level only), and 2.4.3 Selecting an appropriate distribution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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