Think of some discrete random variable you observe on a regular basis.

Use these variable in a month I go out with friends week one 5, week two 3, week three 2, week four 2 times and this is constant for a total of 12 months.

list all of the possible values that this discrete random variable can take. If you can, collect some frequency data - give the relative frequency table and use this as an estimate of the probability distribution. Calculate the expected value and the standard deviation for this probability distribution. Interpret these parameters, and discuss whether they make sense based on your experience.