A queueing system has three servers with expected service times of 15 minutes, 12 minutes and 10 minutes. The service times have an exponential distribution. Each server has been busy with a current customer for 8 minutes. Determine the expected remaining time until the next service completion.

2. Baldur is a big fan of salaries. He collects data on wages and the length of schooling the people had from 100 employees in a large company with the aim of creating a model that can predict wages by level of education (measured in the number of years in school after primary school). The employees with the lowest level of education in Baldur's data immediately entered the labor market after compulsory school leaving, while those with the highest level of education have completed 9 years of schooling after leaving compulsory school leaving. Baldur started by drawing the data and saw that the relationship is linear. He also calculated some fish sizes that can be seen below: standard Change average deviation salary 660020 150100 Education (year from primary school diploma) 5.5 2.2 He also calculated the correlation coefficient between salary and level of education (measured in the number of years in school from primary school exam) and obtained r = 0.55. a.) Find the equation regression…

A firm that operates a​ large, direct-to-consumer sales force would like to implement a system to monitor the progress of new agents. A key task for agents is to open new​ accounts; an account is a new customer to the business. To build such a​ system, the firm has been monitoring sales of new agents over the past 2 years. The response of interest is the profit to the firm​ (in dollars) of contracts sold by agents over their first year. Among the possible predictors of this performance is the number of new accounts developed by the agent during the first 3 months of work.

Define Matrix Representations of OLS Regression Statistics?

Chapter 5, Section 1, Exercise 019 MORE BENEFITS OF EATING ORGANICUsing specific data, we find a significant difference in the proportion of fruit flies surviving after 13 days between those eating organic potatoes and those eating conventional (not organic) potatoes. This exercise asks you to conduct a hypothesis test using additional data. In this case, we are testing       H0⁢ : po⁢= pcHa⁢: po⁢ > pc where po and pc represent the proportion of fruit flies alive at the end of the given time frame of those eating organic food and those eating conventional food, respectively. Use a 5% significance level.Effect of Organic Bananas After 25 DaysAfter 25 days, the proportion of fruit flies eating organic bananas still alive is 0.42, while the proportion still alive eating conventional bananas is 0.40. The standard error for the difference in proportions is 0.029.What is the value of the test statistic?Round your answer to two decimal places. z=  What is the p-value?Round your answer to…

What does February 2020’s actual grocery store sales value tell us about the strength of this model to extend past the ten years covered in the scatterplot?​ ​

Heteroscedasticity   Stigler and Friedland (1983) conducted a study to determine whether the separation of company control from company ownership affects company profits. Using data from 69 companies in the United States, the authors estimate the following model:   profiti = α + β1asseti + β2management_controli + ei Where i is company and: profiti = annual profit (in million dollar) asseti = company asset (in million dollar) management_controli = dummy variable that is worth one if the control of the company is held by the manager   The regression results are presented in the table in the picture   a. Explain whether the statements below are TRUE, FALSE, or CANNOT BE DETERMINED. "If there is a heteroscedasticity problem, the confidence interval of the OLS estimator is not valid." b. Determine the 95% confidence interval for the parameter 2, what can you conclude?

cipate worth S Exercise 2.9.8. [S][Section 2.1][Goal 2.1][Goal 2.5] Counting red blood cells. On page 240 of the April 2011 issue of the Bulletin of the American Mathematical Society Misha Gromov wrote that Erythrocytes are continuously produced in the red bone marrow of large bones... at the rate ~ 2.5 million/second or~ 200 billion/day. Adult humans have 20-30 trillion erythrocytes,~ 5 million/ cubic millimeter of blood. [R54] (a) What is an erythrocyte? (b) Check that 2.5 million/second is about 200 billion/day. (c) Use the numbers in the second sentence to estimate the volume of blood in an adult human, in liters. (d) Check your answer to the previous question with a web search.

: 39% in 30m 20 CALENDAR Travel to Home Today at 11:02 PM Green Street f... Lumen... Sign In or School.. ohm Rukayat Balogun오 | User Settings My Classes Log Out ork manager ges Forums Calendar Gradebook 1:30am Fall 2018> Assessment pplications of Systems of Equations Due in 11 hours, 28 minutes. Due Fri 12/21/2018 10:00 am Monico needs to mix a 10% alcohol solution with a 50% alcohol solution to create 100 milli!eters of a 26% solution. How many millileters of each solution must Monico use? Answer: Monico must mix -milli!eters of 10% solution and milli!eters of 50% solution. Points possible: 1 Unlimited attempts License Submit on

course name : stochastic models