Phone calls that come to the customer service number are independent. Average waiting time until the fifth phone call is 10 minutes.
a.Find the average waiting time between any two consecutive phone calls.
b. Find the variance of the waiting time until the fifth phone call to customer service
.c. Find the variance of the waiting time until the first phone call to customer service.
d. Find the 80th percentile of the waiting time until the first phone call.
Phone calls that come to the customer service number are independent. Average waiting time until the...
Phone calls that come to the customer service number are independent. Average waiting time until the fifth phone call is 10 minutes. a.Find the average waiting time between any two consecutive phone calls. b. Find the variance of the waiting time until the fifth phone call to customer service .c. Find the variance of the waiting time until the first phone call to customer service. d. Find the 80th percentile of the waiting time until the first phone call.
On the average, every 12 seconds a customer makes a call using a certain phone card. Calls are modeled by a Binomial counting process with 2-second frames. Find the mean and the variance for the time, in seconds, between two consecutive calls.
The waiting times on hold for a call to a customer service department are observed to have the following probability distribution Number of calls, x Waiting time, minutes, f(x) 3 10 15 10 6 2 4 10 The expected value of the waiting time for a random call is most nearly: 7.3 minutes 9.2 minutes 11.5 minutes 15.0 minutes
Suppose that the average waiting time at a banking service is 10 minutes. A customer waited for 10 minutes, find the probability that he will be still waiting after 30 minutes. What is the approximate probability that the average waiting time of the next 25 customers is at most 12 minutes?
The number of phone calls arriving at a switchboard can be represented by a Poisson random variable. The average number of phone calls per hour is 1.7. (a) Find the probability of getting a total of at least 3 phone calls in the next hour. (b) Find the probability of getting a total of at least 3 phone calls in the next two hours. (c) Find the probability that it is more than 30 minutes until the next call arrives....
nationwide, the average waiting time until a electric utility customer service representative answers a call is 360 seconds. The gigantic kilowatt energy company randomly sampled 40 calls and found that, on average, they were answered in 331 seconds with a population standard deviation of 30 seconds. can the company claim that they are faster than the average utility at a=0.05? a. no because the test value -0.97 falls in the critical region b. no because the test value is -0.15...
93. At a 911 call center, calls come in at an average rate of one call every two minutes. Assume that the time that elapses from one call to the next has the exponential distribution. Where appropriate, round answers to three decimal places (i.e. 0.123) a. On average, how much time occurs between five consecutive calls? Answer minutes b. Find the probability that after a call is received, it takes more than three minutes for the next call to occur....
93. At a 911 call center, calls come in at an average rate of one call every two minutes. Assume that the time that elapses from one call to the next has the exponential distribution. Where appropriate, round answers to three decimal places (i.e. 0.123) a. On average, how much time occurs between five consecutive calls? Answer ____minutes b. Find the probability that after a call is received, it takes more than three minutes for the next call to occur....
Problem 6: 10 points John is a customer service representative who responds to the calls. The number of calls during one shift is (N + 1), where is Poisson distributed with the expected value-λ = 24, the duration, U, of a single call (in minutes) is uniformly distributed over the interval (2,8) N+1 Suppose that T- X, represents the actual time spent by John with customers on the phone. 1. Evaluate the average busy time, E T], for John 2....
At a convenience store there is only one cashier. It is estimated that average service time by the cashier is 2 minutes, and the standard deviation of service time is 1 minute. The owner observed that on average customers arrive every 4 minutes, and the standard deviation of the time between two consecutive arrivals is also 4 minutes. Answer the following questions (or fill in the blanks): a) E(A) = ________, E(S) = _________ (Note: please include the time unit)...