A small engine shop receives an average of 1.61 repair calls per hour, with a standard...
A small engine shop receives an average of 1.61 repair calls per hour, with a standard deviation of 0.31. Complete parts a) through c).
a) What is the mean of the number of calls they receive during a four hour period?
(Round to two decimal places as needed.)
b) What is the standard deviation of the number of calls they receive during a four hour period?
(Round to two decimal places as needed.)
c) What assumptions underlie your analysis?
A.The hours are independent of each other.
B. The number of calls is a continuous random variable.
C. The number of calls is a discrete random variable.
D. The hours are dependent.
Homework Answers
a)
mean of the number of calls they receive during a four hour period =1.61*4=6.44
b)
standard deviation of the number of calls they receive during a four hour period =0.31*sqrT(4)=0.62
c) A.The hours are independent of each other.
Add Answer to:
A small engine shop receives an average of 1.61 repair calls
per hour, with a standard...
Emergency 911 calls to a small municipality in Idaho come in at the rate of one...
Emergency 911 calls to a small municipality in Idaho come in at the rate of one every two minutes. Assume that the number of 911 calls is a random variable that can be described by the Poisson distribution. (a) What is the expected number of 911 calls in one hour? per hour (b) What is the probability of three 911 calls in five minutes? If required, round your answer to four decimal places. (c) What is the probability of no...
A call center receives an average of 13 calls per hour. Assuming the number of calls...
A call center receives an average of 13 calls per hour. Assuming the number of calls received follows the Poisson distribution, determine the probability would receive exactly 15 calls. Round to four decimals.
value 10.00 points Problem 18-1 Repair calls are handled by one repairman at a photocopy shop....
value 10.00 points Problem 18-1 Repair calls are handled by one repairman at a photocopy shop. Repair time, including travel time, is exponentially distributed, with a mean of 2.5 hours per call. Requests for copier repairs come in at a mearn rate of 2.1 per eight-hour day (assume Poisson). a. Determine the average number of customers awaiting repairs. (Round your answer to 2 decimal places.) Number of customers b. Determine system utilization. (Round your answer to the nearest whole percent....
6 ht: Chapter 5.5-5.6 Problem 0521 (Discrete Preba Mility Distributions) eBook Emergency 911 calls to a...
6 ht: Chapter 5.5-5.6 Problem 0521 (Discrete Preba Mility Distributions) eBook Emergency 911 calls to a small municipality in Idaho come in at the rate of one every two minutes. Assume that the number of (a) What is the expected number of 911 calls in one hour? per hour (b) What is the probability of three 911 calls in five minutes? If required, round your answer to four decimal places. (c) What is the probability of no 911 calls during...
A telemarketer makes six phone calls per hour and is able to make a sale on...
A telemarketer makes six phone calls per hour and is able to make a sale on 30 % of these contacts. During the next two hours, obtain: The probability of making exactly four sales. (Round the final answer to 4 decimal places.) The probability of making no sales. (Round the final answer to 4 decimal places.) The probability of making exactly two sales. (Round the final answer to 4 decimal places.) The mean number of sales in the two-hour period....
18 Homework Problems Problem 18-1 Repair calls are handled by one repairman at a photocopy shop....
18 Homework Problems Problem 18-1 Repair calls are handled by one repairman at a photocopy shop. Repair time, including travel time, is exponentially distributed, with a mean of 25 hours per call Requests for copler repairs come in at a mean rate of 2.1 per eight-hour day (assume Poisson). a. Determine the average number of customers awaiting repairs. (Round your answer to 2 decimal places.) Number of customers b. Determine system utilization (Round your answer to the nearest whole percent....
Please help somewhat confused on all parts Repair calls are handled by one repairman st a...
Please help somewhat confused on all parts
Repair calls are handled by one repairman st a photocopy shop. Repair time, including travel time, is exponentisly distributed, with a mean of 2.0 hours per call. Requests for oopier repairs oome in at a mean rste of 2.1 per eight-hour day (assume Poisson) a. Determine the average number of oustomers awaiting repairs (Round your answer to 2 decimal places.) Number of customers 0.58 b. Determine system utilization. (Round your answer to the...
A computer repair shop has two work centers. The first center examines the computer to see...
A computer repair shop has two work centers. The first center examines the computer to see what is wrong, and the second center repairs the computer. Let x1 and x2 be random variables representing the lengths of time in minutes to examine a computer (x1) and to repair a computer (x2). Assume x1 and x2 are independent random variables. Long-term history has shown the following times. Examine computer, x1: μ1 = 29.7 minutes; σ1 = 8.0 minutes Repair computer, x2:...
Huang’s television-repair service receives an average of 9 TV sets per 6-hour day to be repaired....
Huang’s television-repair service receives an average of 9 TV sets per 6-hour day to be repaired. The service manager would like to be able to tell customers that they can expect their TV back in 4 days. What average repair time per set will the repair shop have to achieve to provide 4-day service on the average? (Assume that the arrival rate is Poisson distributed and repair times are exponentially distributed.) (Round answer to 2 decimal places, e.g. 2.75.) Average...
7) A sales firm receives an average of four calls per hour on its toll-free number....
7) A sales firm receives an average of four calls per hour on its toll-free number. For any ) given hour, find the probability that it will receive exactly nine calls from 200 PM-4:00 PM.
value 10.00 points Problem 18-1 Repair calls are handled by one repairman at a photocopy shop. Repair time, including travel time, is exponentially distributed, with a mean of 2.5 hours per call. Requests for copier repairs come in at a mearn rate of 2.1 per eight-hour day (assume Poisson). a. Determine the average number of customers awaiting repairs. (Round your answer to 2 decimal places.) Number of customers b. Determine system utilization. (Round your answer to the nearest whole percent....
6 ht: Chapter 5.5-5.6 Problem 0521 (Discrete Preba Mility Distributions) eBook Emergency 911 calls to a small municipality in Idaho come in at the rate of one every two minutes. Assume that the number of (a) What is the expected number of 911 calls in one hour? per hour (b) What is the probability of three 911 calls in five minutes? If required, round your answer to four decimal places. (c) What is the probability of no 911 calls during...
18 Homework Problems Problem 18-1 Repair calls are handled by one repairman at a photocopy shop. Repair time, including travel time, is exponentially distributed, with a mean of 25 hours per call Requests for copler repairs come in at a mean rate of 2.1 per eight-hour day (assume Poisson). a. Determine the average number of customers awaiting repairs. (Round your answer to 2 decimal places.) Number of customers b. Determine system utilization (Round your answer to the nearest whole percent....
Please help somewhat confused on all parts
Repair calls are handled by one repairman st a photocopy shop. Repair time, including travel time, is exponentisly distributed, with a mean of 2.0 hours per call. Requests for oopier repairs oome in at a mean rste of 2.1 per eight-hour day (assume Poisson) a. Determine the average number of oustomers awaiting repairs (Round your answer to 2 decimal places.) Number of customers 0.58 b. Determine system utilization. (Round your answer to the...
7) A sales firm receives an average of four calls per hour on its toll-free number. For any ) given hour, find the probability that it will receive exactly nine calls from 200 PM-4:00 PM.
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago