The times in minutes for seven students to become proficient at a new computer game were measured. The results are shown below.

15, 10, 48, 10, 19, 14, 16

1. Find the mean and standard deviation of these times.
2. State which of the mean, median or mode you consider would be most appropriate to use as a measure of central tendency to represent the data in this case.
3. For each of the two measures of average you did not choose in part (ii), give a reason why you consider it inappropriate.