Problem 7-13In an initial survey designed to estimate the percentage of time air-express cargo loaders are idle, an analyst found that loaders wereidle in 5 of the 45 observations.a. What is the estimated percentage of idle time? (Round your answer to 2 decimal places. Omit the "%" sign in your response.)Estimated percentage of idle time%b. Based on the initial results, approximately how many observations would you require to estimate the actual percentage of idle timeto within 4 percent with a confidence of 95 percent? (Round your z value to 2 decimal places. Do not round any other Intermediatecalculations. Round UP your final answer to the next whole number.)Number of observations

Plese find the calculation below regarding the percentage of idle time and number of observations.

Answered: Problem 7-13 In an initial survey…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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Chapter 5. (M/M/s/K Model). Leia is responsible for 8 computers in the IT offices in a small business called DataWish. Each computer runs on an average for 3 weeks and requires an average of ½ or 0.5 weeks to get reset by Leia before it can start up again. If we assign the Poisson distribution to the "arrival" of each computer for service and an exponential distribution to the actual service provided, answer the following questions: a. The arrival rate would be units per week and the service rate would be units per week. b. Calculate the following operating characteristics for the M/M/s/K system: Utilization Factor (p) % Performance Measures PO (probability that sytem is empty) L (average units in units system) La (average units waiting in queue) units W (average time in the weeks system) Wq (average time in the queue) weeks c. If we assign a cost of waiting as $500 per week per computer and $800 per week of hiring Leia, what is the Total Time Cost per week cost of servicing the…
Question 3) Waiting Line Analysis Helen runs a small shop where she provides a service. She is able to process an average of 8 customers per hour. An average of 5 customers per hour seek this service at her shop. What is: a) the probability that Helen will not be working with a customer (no customers) when the shop phone rings? b) the probability of 4 customers in the system? c) the average time a customer spends waiting in line (in minutes)?
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Kay and Micheal Passe publish what's Happening?--a biweekly newspaper to publicize local events. whats happening? has a few subscribers; it typically is sold at checkout stands. Much of the revenue comes from advertisers of garage sales and supermarket specials. In an effort to reduce costs associated with printing too many papers or delivering them to the wrong location, Micheal implemented a computerized system to collect sales data. Sales-counter scanners accurately record sales data for each location. Since the system was implemented, total sales volume has steadily declined. selling advertising space and maintainting shelf space at supermarkets are getting deifficult. Reduced revenue makes controlling costs all the more important. For each issue. Micheal caefully makes a forecast based on sales data collected at each location. Then he orders papers to be printed and distributed in quantities matching the forecast. Micheal's forecast refect a downward trend, which is present in the…
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