A mall order computer software business has sik telephone lines. Let x denote the number of...
A mail-order company business has six telephone lines. Let X denote the number of lines in use at a specified time. Suppose the pmf of X is as given in the accompanying table. 4 .19 5 0.09 6 0.01 0 x o 1 2 3 p(x) 0.11 0.15 0.20 0.25 Calculate the probability of each of the following events. (a) {at most three lines are in use} (b) {fewer than three lines are in use} (c) {at least three lines...
A mail-order company business has six telephone lines. Let X denote the number of lines in use at a specified time. Suppose the pmf of X is as given in the accompanying table. x 0 1 2 3 4 5 6 p(x) 0.12 0.15 0.20 0.25 0.18 0.07 0.03 Calculate the probability of each of the following events. (a) {at most three lines are in use} (b) {fewer than three lines are in use} (c) {at least three lines are...
Applies Stats for Engineers and Scientists A mail-order computer business has six telephone lines. Let x denote the number of lines in use at a specified time. Suppose the mass function of x is given by 1 5 6 2 3 4 0 x: p(x): .10 .15 20 .25 .20?? a. In the long run, what proportion of the time will at most three lines be in use? Fewer than three lines? b. In the long run, what proportion of...
0 points DevoreStat9 3.E 013 A mail-order company business has six telephone lines. Let X denote the number of lines in use at a specified time. Suppose the pmf of X is as given in the accompanying table 6. -1 My Notes p(x) 0.11 0.15 0.20 0.25 0.19 0.07 0.03 Calculate the probability of each of the following events. (a) fat most three lines are in use) (b) fewer than three lines are in use (c) sat least three lines...
1. A mail-order computer business has six telephone lines. X denotes the number The probability mass function of X is given of the lines in use at a specified time. in the accompanying table. 0 2 20 3 25 20 4 5 06 6 04 P(Xx) 10 .15 Find P(1< X <4) and P(X-2) b. E(X), Var(X) c. In a random sample of 10 randomly selected times, let Y be the number of the times that exactly two lines are...