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2 Statistics

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Question 365

A quality-control model assumes that items pass inspection independently with probability 0.94. Four items are selected.

a.

Find the probability that at least one item fails inspection.

[2]
b.

Find the probability that exactly one item fails inspection.

[2]
c.

Give two reasons why the independence assumption might be unsuitable for four items made consecutively.

[2]
Markscheme

2 Statistics Questions

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

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