The number of phone calls coming into a switchboard in the next five minutes will either be 0,1,2,3,4,5,or 6.The probabilities are the same for each of these (1/7).If X is the number of calls arriving in a five-minute time period,what is the mean of X?
A)2
B)3
C)4
D)5
E)None of the above

Question

Quizplus · Accepted Answer

The mean of a discrete uniform distribution is calculated as the average of the possible values. Here, the mean is (0+1+2+3+4+5+6)/7 = 3.

The Number of Phone Calls Coming into a Switchboard in the Next