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2.4 Statistical Distributions

2.4 Statistical Distributions

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Question 64
57%

A fair 4 sided spinner has sides numbered 1, 2, 3 and 4.

a.

Write down the name of the distribution that can be used to model the number the spinner lands on from each spin.

[1]
b.

The spinner is spun 40 times. The random variable X X\,X represents the number of times the spinner lands on 3. Find the probability that the spinner lands on 3 exactly 10 times.

[2]
c.

Find P(6≤X<10)P(6 \leq X < 10)P(6≤X<10)

[3]
Markscheme

2.4 Statistical Distributions Questions

  1. A Level
  2. /Maths
  3. /2.4 Statistical Distributions

390 exam-style questions on OCR A Level Maths 2.4 Statistical Distributions, covering 2.4.1 Discrete probability distributions, 2.4.2 Binomial distribution as a model, 2.4.3 Calculating binomial probabilities, 2.4.4 Mean and variance of the binomial (A-level only), 2.4.5 Normal distribution as a model (A-level only), 2.4.6 Probabilities using the normal distribution (A-level only), 2.4.7 Links to histograms, mean and standard deviation (A-level only), and 2.4.8 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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