Final answer:
The range is $2,888 and the best measure of central tendency to use is the mean.
Step-by-step explanation:
The range is the difference between the highest and lowest values in a set of data. In this case, the highest price is $18,888 and the lowest price is $16,000. So the range is $18,888 - $16,000 = $2,888.
The best measure of central tendency to use to get a reasonable estimate for the cost of the car is the mean. The mean is the average of all the prices in the set. It takes into account all the prices and gives a balanced estimate of the cost.