The best measure of center for this data set is the median, and its value expressed up to one decimal place is 38.0.
To find the median, we first need to arrange the data set in order from smallest to largest:
{16, 18, 28, 29, 35, 36, 37, 38, 40, 41, 44, 66, 68, 72}
Since there are an odd number of values in the data set (14), the median is simply the middle value. In this case, the middle value is 38.0.
The median is a better measure of center than the mean in this case because there are a few outliers in the data set (e.g. 68 and 72). These outliers can significantly affect the mean and make it an unreliable measure of center.