The total is \(2+2+3+3+4+4+24=42\), so the mean is \(42\div7=6\).

The fourth of the seven ordered values is 3, so the median is 3 minutes.

Six of the seven waits are between 2 and 4 minutes. The 24-minute wait raises the mean; the median better describes the usual short wait here.

Answer

Mean \(6\) minutes; median \(3\) minutes. The median is a sensible choice for a usual wait.