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2 Statistics

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Question 463

A call centre models the number C C\,C of unanswered calls in an hour by C∼B(30,0.08)C\sim B(30,0.08)C∼B(30,0.08).

a.

Find the mean of CCC.

[1]
b.

Find P(C≥5)P(C\geq5)P(C≥5).

[2]
c.

Estimate the number of hours with at least 5 unanswered calls in a period of 120 hours.

[2]
d.

Give one reason why a binomial model might be unsuitable.

[1]
Markscheme

2 Statistics Questions

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

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