Which measure of central tendency is generally used in determining the size of the most saleable shoes in a department store?

What is the median age of a group of employees whose ages are 36, 38, 18, 10 16 and 15 years?

Nine people gave contribution in pesos 100, 200, 100, 300, 300, 200, 200, 150, 100, and 100 for a door prize. What is the mode contribution?

If the heights in centimeters of a group of students are 180, 180, 173, 170, and 167, what is the mean height of these students?

If the range of a set of scores is 14 and the lowest score is 7, what is the highest score?