T2W6 TS Q34 – Selective High School

A school survey shows that the percentage of students who are late because they miss the bus has increased from 2% to 8% over the past year.

Which of the following statements, if true, could explain this?

The number of students at the school has increased. Students cannot be late if they arrive before the bell. The percentage of students who are late because they overslept has decreased by 6%. The school has started recording reasons for lateness more carefully, so fewer late students are listed as having an “unknown reason.”

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Which of the following statements, if true, could explain this?