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Statistical Distributions

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Question 9

A random variable Y Y\,Y records the number of items selected from a display. Its probability function is:

P(Y=y)=3y−157y=1,2,3,4,5,6 P(Y=y)=\frac{3y-1}{57} \quad y=1,2,3,4,5,6 P(Y=y)=573y−1​y=1,2,3,4,5,6
a.

Construct a table giving the probability function of YYY.

[2]
b.

Find P(2.2<Y<5.6)P(2.2 < Y < 5.6)P(2.2<Y<5.6)

[1]
c.

Construct a table for the cumulative distribution F(y)=P(Y≤y)F(y)=P(Y\leq y)F(y)=P(Y≤y).

[2]
Markscheme

Statistical Distributions Questions

  1. AS Level
  2. /Maths
  3. /Statistical Distributions

57 exam-style questions on Edexcel AS Level Maths Statistical Distributions, covering 6.1 Probability Distributions, 6.2 The Binomial Distribution, and 6.3 Cumulative Probabilities. Each one has a worked solution and a mark scheme showing where the marks go.

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