The following data show the number of occupants in passenger cars observed during one hour at a busy intersection in Los Angeles (69). Suppose it can be assumed that these data follow a geometric distribution, p_X(k; p) = (1 − p)^k−1 p, k = 1, 2, . . .. Estimate p and compare the observed and expected frequencies for each value of X.

Number of Occupants           Frequency

1………………………….      678

2………………………….      227

3………………………….      56

4………………………….      28

5………………………….      8

6+…………………………     14

……………………………    1011