Final answer:
The time interval reported by the construction worker would be the same as the interval reported by the student.
Step-by-step explanation:
The time interval reported by the construction worker would be the same as the interval reported by the student. The time it takes for the ball to reach its highest position is determined by the laws of physics and is independent of the observer. In this case, both the student and the construction worker would observe the same time interval because they are measuring the same physical process.