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2 Statistics

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Question 35

Blade mass is modelled by a Normal distribution with known population standard deviation 12.4 g. A manufacturing process is intended to have population mean 450.0 g. An engineer suspects that the mean has decreased. A random sample of 50 blades has mean mass 446.2 g.

Carry out a hypothesis test at the 2% significance level.

[7]
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2 Statistics Questions

  1. A Level
  2. /Maths
  3. /2 Statistics

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