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2.5 O: Statistical hypothesis testing

2.5 O: Statistical hypothesis testing

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Question 16

The scores on a standardised aptitude test are assumed to follow a normal distribution with a mean of 50 and a standard deviation of 8.

a.

Using this model, find the probability that a randomly chosen candidate scores more than 65.

[1]
b.

A researcher claims that the mean score of candidates from a specific region is higher than 50. A random sample of 64 candidates from this region has a mean score of 52. Test the researcher's claim at the 5% level of significance. You should state your hypotheses clearly.

[4]
Markscheme

2.5 O: Statistical hypothesis testing Questions

  1. A Level
  2. /Maths
  3. /2.5 O: Statistical hypothesis testing

162 exam-style questions on AQA A Level Maths 2.5 O: Statistical hypothesis testing, covering 2.5.1 Language of hypothesis testing, 2.5.2 Hypothesis test for a binomial proportion, and 2.5.3 Hypothesis test for a Normal mean (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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