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2 Statistics

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Question 237

A factory models component lifetime by a Normal distribution. A histogram from 500 components is unimodal but has a long right tail, and lifetimes cannot be negative.

a.

Give one feature supporting the model and two features that cast doubt on it.

[3]
b.

Suggest two practical ways to assess or improve the model.

[2]
Markscheme

2 Statistics Questions

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

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