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3.7 Hypothesis Testing with the Normal Distribution

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Question 78

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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3.7 Hypothesis Testing with the Normal Distribution Questions

  1. A Level
  2. /Maths
  3. /3.7 Hypothesis Testing with the Normal Distribution

130 exam-style questions on Edexcel A Level Maths 3.7 Hypothesis Testing with the Normal Distribution. Each one has a worked solution and a mark scheme showing where the marks go.

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