Sophie and Jack do a survey every day for three weeks. Sophie counts the number of pedal cycles using Market Street. Jack counts the number of pedal cycles using Strand Road. The data they collected are summarised in the back-to-back stem and leaf diagram.

a Write down the modal number of pedal cycles using Strand Road. The quartiles for these data are summarised in the table below.

b Find the values for X, Y and Z. c Write down the road you think has the most pedal cycles travelling along it overall. Give a reason for your answer.AppendixLO1

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Sophie Stem Jack 9975 0 66 Key: 51016 means Sophie counts 5 cycles and Jack counts 7 6 5 3 3 2 2 2 11 1 115 6 cycles 5 3 3 2 2 2 1 22 23 77 89 21 3 234778 4 2 a Write down the modal number of pedal cycles using Strand Road. The quartiles for these data are summarised in the table below.