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2.4 N: Statistical distributions

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Question 63

The discrete random variable X X\,X has the probability function

P(X=x)=2x−136\displaystyle P(X = x) = \frac{2x - 1}{36}P(X=x)=362x−1​ for x=1,2,3,4,5,6x = 1, 2, 3, 4, 5, 6x=1,2,3,4,5,6

a.

Construct a table giving the probability distribution of XXX.

[2]
b.

Find P(1.4<X<3.9)P(1.4 < X < 3.9)P(1.4<X<3.9).

[1]
c.

Construct a table for the cumulative distribution function F(x)F(x)F(x).

[1]
Markscheme

2.4 N: Statistical distributions Questions

  1. A Level
  2. /Maths
  3. /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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