The random variable x represents the number of phone calls an author receives in a day, and it has a Poisson distribution with a mean of 6.8 calls. What are the possible values of x? Is a valu x=2.3 possible? Is x a discrete random variable or a continuous random variable? What are the possible values of x? OA. 1, 2, 3,... OB. any real number greater than or equal to 0 and less than or equal to 6.8. O C. any real number greater than or equal to 0 OD. 0, 1, 2, 3, ... Is a value of x = 2.3 possible? Is x a discrete random variable or a continuous random variable? A value of x = 2.3 possible because x is a random variable.