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4.3.2 Statistical hypothesis testing (A-level only)

4.3.2 Statistical hypothesis testing (A-level only)

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Question 85

A researcher investigates the yield of two varieties of wheat, Variety X and Variety Y. They believe that Variety X has a higher mean yield than Variety Y. A random sample of 60 plots of Variety X produced a mean yield of 445 kg with a standard deviation, sXs_XsX​, of 32 kg. Another random sample of 75 plots of Variety Y produced a mean yield of 432 kg with a standard deviation, sYs_YsY​, of 24 kg.

Stating your hypotheses clearly and using a 5% level of significance, test whether or not the researcher's belief is supported by the data.

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4.3.2 Statistical hypothesis testing (A-level only) Questions

  1. A Level
  2. /Maths
  3. /4.3.2 Statistical hypothesis testing (A-level only)

130 exam-style questions on WJEC A Level Maths 4.3.2 Statistical hypothesis testing (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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