Question 1169557
It is not meaningful because of the lack of random sampling.
The problem is the first 200 students who park in the lot are not necessarily representative of the mean commute time. Those who come later may have different traffic patterns, may have been delayed, and the commute time may be quite different if one leaves a few minutes earlier or later.  The plan would give an idea of the commute time, perhaps to then design a randomized study to look at it in more detail. 

The sample may well be normally distributed, and if not, the size of the sample may well allow one to treat it as normal, assuming no skew.