Edexcel S3 2005 June — Question 5

Exam BoardEdexcel
ModuleS3 (Statistics 3)
Year2005
SessionJune
TopicChi-squared distribution

5. The number of times per day a computer fails and has to be restarted is recorded for 200 days. The results are summarised in the table.
Number of restartsFrequency
099
165
222
312
42
Test whether or not a Poisson model is suitable to represent the number of restarts per day. Use a \(5 \%\) level of significance and state your hypothesis clearly.
(Total 12 marks)