If the mean time between unscheduled maintenance of LCD displays in a hospital's CT scan facility is 4,000 operating hours, what is the probability of unscheduled maintenance in exactly 5,000 hours?
If the mean time between unscheduled maintenance of LCD displays in a hospital's CT scan facility...
Problema #1 ( 10 points) A system has a mean time to repar (MTTR) of 30 minutes, and a mean time between unscheduled maintenance actions (MTBF) of 60 hours. The intended utilization (actual hours of operation to meet the customer demand for the output) of the system is 4800 hours per year. determine 1. How many unscheduled maintenance actions are to be expected each year? 2. How many hours of unscheduled maintenance are to be expected each year 3. If...
The time between arrivals of buses follows an exponential distribution with a mean of 60 minutes. a. What is the probability that exactly four buses arrive during the next 2 hours? b. What is the probability that no buses arrive during the next two hours? c. What is the probability that at least 2 buses arrive during the next 2 hours? d. A bus has just arrived. What is the probability that the next bus arrives in the next 30-90...
Question 20 Mean time between failures is an important data in maintenance records True False Click Submit to complete this assessment. eL Question 20 Mean time between failures is an important data in maintenance records True False Click Submit to complete this assessment. eL
The average time between failures of a laser machine is exponentially distributed with a mean of 40,000 hours. a) What is the expected time until 4th failure? b) What is the probability that the time to the 5th failure is greater than 80,000 hours?
(4.7.2) The time between requests to a web server is exponentially distributed with mean 0.5 seconds. What is the value of the parameter ?? What Is the median time between requests? What is the standard deviation? What is the 80th percentile? (4.7.6) [Refer to problem 1 above] Find the probability that there will be exactly 5 requests in a 2-second time interval. Find the probability that there will be more than 1 request in a 1.5-second time interval. Find the...
Question 7 The mean time between failures (often called MTBF) of the battery of a particular brand of computers is 450 hours. Assume that the time between failures is governed by an exponential distribution. What is the probability that the battery will fail (a) within 300 hours? (b) will last at least 500 hours? (c) will fail between 300 to 600 hours?
Suppose a geyser has a mean time between eruptions of 73 minutes. If the interval of time between the eruptions is normally distributed with standard deviation 18 minutes, answer the following questions. (a) What is the probability that a randomly selected time interval between eruptions is longer than 81 minutes? The probability that a randomly selected time interval is longer than 81 minutes is approximately ___ (b) What is the probability that a random sample of 13 time...
Exercise 2.3 The time between phone calls to a call center is exponentially distributed with mean 60 seconds. (a) What is the probability that exactly 4 calls arrive in the next 2 minutes? (6) What is the probability that at least 2 calls arrive in the next 2 minutes? (c) What is the probability that no buses arrive in the next 2 minutes? (d) Given that a call has just arrived, what is the probability that the next call arrives...
A production station has a naturally occurring rate of unexpected breakdowns. The mean time between interruptions is 6 hours. The average repair time is 20 minutes, and the CV for repair time is 1.75. The mean natural processing time is 10 minutes with standard deviation 1 minute. a. What is the effective processing time and the CV of effective process time? b. If the arrival rate to the station is 5 jobs per hour, what is the station’s utilization? c....
Required information: The time between requests to a web server is exponentially distributed with mean 0.5 seconds. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Find the probability that there will be exactly 5 requests in a 2-second time interval. Probability = ?