AQA S3 2011 June — Question 2

Exam BoardAQA
ModuleS3 (Statistics 3)
Year2011
SessionJune
TopicCentral limit theorem

2 The number of emergency calls received by a fire station may be modelled by a Poisson distribution. During a given period of 13 weeks, the station received a total of 108 emergency calls.
  1. Construct an approximate \(98 \%\) confidence interval for the average weekly number of emergency calls received by the station.
  2. Hence comment on the station officer's claim that the station receives an average of one emergency call per day.
    (2 marks)