題組內容

4. The variable, X, is defined as the number of affairs within last year from R.C.
Fair(1978), "'A Theory of Extramarital Affairs," Journal of Political Economy 86,
45-61. The summary statistics and frequency table obtained from excel are as
follows:
61d28f528b480.jpg

b. Using Poisson distribution, what is the (expected) probability that the number of affairs within last year is zero? Compared the number with median, what is the problem? Explain.