Calvin is a train company manager.
He compares the arrival times of a morning train service for 10 days in the summer
and for 10 days in the winter.
In the summer the median number of minutes late was 12.7 minutes.
The range of the number of minutes late was 11 minutes.
The results below show the number of minutes late in the winter.
8, 32, 44, 5, 17, 67, 9, 14, 10, 26
Calvin thinks that in the winter
• the median number of minutes late increases
• the train service is less consistent.
Is Calvin correct?
Show why you think this giving reasons with your answers
19
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