6 .
This question is based on the following data set which represents the number of times that Christine's friends cycled to school: 9, 2, 4, 5, 6, 9, 10.
Christine decided to include one more friend in her survey. If that friend hadn't cycled to school in the last month, how would that affect the latest month's value of the 'mean'?
It would lower the value of the 'mean'
It wouldn't affect the value of the 'mean' because the number of times she has cycled to school = 0
There isn't enough information to answer this question
It would increase the value of the 'mean'