In a population of 20 families, the number of cars owned by each family is given below: 0, 2, 2, 3, 1, 1, 4, 2, 4, 5, 1, 3, 6, 1, 2, 4, 3, 2, 3, 3

Let X be the number of cars owned, and X_i be the possible values of X. Use this data to answer the following questions:

a.) Write down the relative-frequency distribution for X.

b.) Find the median of number of cars owned.

c.) Find the mean of number of cars owned.

d.) Using (b) and (c), are there more than 50% of values X_i above the mean, or less? Explain your answer.