Suppose your work for the university of Michigan. The university wants to implement an email spam filter. So use the mbox.txt file that we used in class, build a filter system that filters emails into several categories of security levels: level 1 is the email from Uof M (@ umich.edu), level 2 is the email from other North American universities (@ xyz.edu), level 3 is the email from other educational institutions around the world (.uk, .za, etc.), and level 4 is the email from other email services (g m ail, etc). Please print out these 4 levels and also list all the senders (only those in the "From" lines) in each category. Example output: Level 1: zqian@ umich.edu Level 2: louis@ media.berkeley.edu ray@ media.berkeley.edu mmmy@ indiana.edu Level 3: antranig@ caret.cam.ac.uk david.horwitz@ uct.ac.za Level 4: gopal.ramasammycook@ g mail.com

Answer both questions

9.) (ch 6) Suppose that Danielle’s wage-schooling locus is given by

a) Derive the marginal rate of return (MRR) schedule. When will Danielle quit school if her discount rate is 10 percent?

b) Suppose the government imposes an income tax of 20% on both labor earnings and interest income. What is the impact ofthis income tax on Danielle’s educational attainment (will itincrease or decrease)? Explain your answer.

10.) (ch 6) Peter has just graduated from HS. He will live for three more periods, and he is considering three alternative education-work options. He can start working right away, earning $100,000 in period 1, $110,000 in period 2, and $90,000 in period 3. He can also go to college in period 1 spending $10,000 in that period, and then earn $150,000 in periods 2 and 3. Finally, he can go to college in period 1 and get an MBA in period 2. This last option will cost him nothing in year 2 (books and tuition are covered by a research assistant position). After getting his MBA, he will earn $300,000 in period 3.

a) If Peter’s discount rate is 0.20, which path will maximize his net present value of his lifetimeearnings?
b) Why is it realistic that his wage for option one decreases to $90,000 in year 3?

1.Which of the following scenarios would it be appropriate to use a normal approximation for the sampling distribution of the sample proportion?

Select one:

a.) A researcher wishes to find the probability that more than 60% of a sample of undergraduate students from UNC will be female. She samples the first 42 students that walk into the gym on Monday morning. The population proportion of undergraduate females at UNC is known to be 60.1%.

b.)A researcher wishes to find the probability that less than 5% of a sample of undergraduate students from Appalachian State University will be between the ages of 25 and 34. He randomly samples 50 undergraduate students from the student database. The proportion of undergraduates between the ages of 25 and 34 is 5.3%.

c.)A grad student at NC state wants to know how likely it is that a group of students would be made up of more than 27% graduate students. She will randomly select 38 students and ask them if they are a graduate student or an undergraduate student. The population proportion of grad students at NC state is 26.6%.

d.)A full-time student at Fayetteville State University wants to know how likely it is that a group of students would be made up of less than 70% full-time students. She will ask 30 people that she sees parking in the parking deck if they are full-time or part-time. The population of full-time students at Fayetteville State is known to be 72%.

2. In the general population in the US, identical twins occur at a rate of 30 per 1,000 live births. A survey records 10,000 births during Jan 2018 to Jan 2019 and found 400 twins in total. Which of the following are true?

Select one or more:

The proportion of twin births during Jan 2018 to Jan 2019 is .03.

The proportion of twin births during Jan 2018 to Jan 2019 is .04.

The probability of twin births among the general population is .03.

The probability of twin births among the general population is .04.

Pr(observing a sample proportion of twin births from a random sample of 10,000 live births <= 0.04) = 0.03.

Pr(observing a sample proportion of twin births from a random sample of 10,000 live births <= 0.04) = 0.5.

Pr(observing a sample proportion of twin births from a random sample of 10,000 live births <= 0.03) = 0.04.

Pr(observing a sample proportion of twin births from a random sample of 10,000 live births <= 0.03) = 0.5.

5. (a)A sample of 12 of bags of Calbie Chips were weighed (to the nearest gram), and listed, here as follows.

219, 226, 217, 224, 223, 216, 221, 228, 215, 229, 225, 229 Find a 95% confidence interval for the mean mass of bags of Calbie Chips.

[9 marks]

(b) Professor GeniusAtCalculus has two lecture sections (A and B) of the same 4th year Advanced Calculus (AMA 4301) course in Semester 2. She wants to investigate whether section A students maybe ”smarter” than section B students by comparing their perfor- mances in the midterm test. A random sample of 12 students were taken from section A, with mean midterm test score of 78.8 and standard deviation 8.5; and a random sample of 9 students were taken from section B, with mean midterm test score of 86 and standard deviation 9.3. Assume the population standard deviations of midterm test scores for both sections are the same. Construct the 90% confidence interval for the difference in midterm test scores of the two sections. Based on the sample midterm test scores from the two sections, can Professor GeniusAtCalculus conclude that there is any evidence that one section of students are ”smarter” than the other section? Justify your conclusions.

[8 marks]

(c) The COVID-19 (coronavirus) mortality rate of a country is defined as the ratio of the number of deaths due to COVID-19 divided by the number of (confirmed) cases of COVID-19 in that country. Suppose we want to investigate if there is any difference between the COVID-19 mortality rate in the US and the UK. On April 18, 2020, out of a sample of 671,493 cases of COVID-19 in the US, there was 33,288 deaths; and out of a sample of 109,754 cases of COVID-19 in the UK, there was 14,606 deaths. What is the 92% confidence interval in the true difference in the mortality rates between the two countries? What can you conclude about the difference in the mortality rates between the US and the UK? Justify your conclusions. [8 marks]

please,short answers

A. Majdi has a degree in accounting from BZU and works for a local accounting office. He was asked by a friend to prepare Financial statements for a small company in Ramallah. To help his friend Majdi prepared the financial statements and a report indicating that the financial statements were audited by him. What standards were violated and why? Is there a violation of the elements of audit quality control, briefly discuss?

b.Mira A Certified Public Auditor licensed in Palestine is the partner in charge of Ooredoo audit. In order to save cost, she hired a group of students from Al-Najah University to help her conduct the audit. A month later Mira received the audited financial statements and the report from the students. She signed it and send it to the board of directors of Ooredoo. What standards were violated and why? Is there a violation of the elements of audit quality control, briefly discuss?

A. Majdi has a degree in accounting from BZU and works for a local accounting office. He was asked by a friend to prepare Financial statements for a small company in Ramallah. To help his friend Majdi prepared the financial statements and a report indicating that the financial statements were audited by him. What standards were violated and why? Is there a violation of the elements of audit quality control, briefly discuss?

1. Mira A Certified Public Auditor licensed in Palestine is the partner in charge of Ooredoo audit. In order to save cost, she hired a group of students from Al-Najah University to help her conduct the audit. A month later Mira received the audited financial statements and the report from the students. She signed it and send it to the board of directors of Ooredoo.

What standards were violated and why?

Is there a violation of the elements of audit quality control, briefly discuss?

Discuss the pros and cons of a US based domestic company aggressively investing in emerging economies. You may use a particular company (by name) and a particular emerging economy (by name) to provide your examples. (International Management

Why is economic growth important to us and what are the most important/critical factors that contribute to growth?

What is holding the US economy back from achieving the desired 4% growth?

A company in the civil engineering industry with headquarters locate in Accra undertakes contract anywhere in Ghana

The company has had its tender for a job in Kumasi Accepted for GHS 288,000 and work is due to begin in June 2020. However, the company has also been asked to undertake a contract on the Coast of Accra. The price offered for this contract is GHS 352,000. Both of the contracts cannot be undertaken simultaneously because of constraints on staff site management personnel and on plant available. An escape clause enables the company to withdraw from the contract in Accra, provided notice is given before the end of April, 2020 and an agreed penalty of GHS 28,000 is paid.

The company’s quantity surveyor has submitted the following estimates

Additional Information:

1. X, Y and Z are three building materials. Material X is not in common use and would not realize much money if re-sold; however, it could be used on other contracts but only as a substitute for another material currently quoted at 10% less than the original cost of X. The price of Y a material in common use has doubles since it was purchased; it net realizable value if resold would be the new price less 15% to cover the disposal cost. Alternatively, it could be kept for use on another contract in the following year.

2. With the construction industry not yet recovered from the recent recession, the company is confident that manual labour, both skilled and unskilled could be hired locally on a sub-contract basis to meet the needs of each of the contracts

3. The plant, which would be needed for the Coast of Accra contract, has been owned by for some years and GHS 12,800 is the year’s depreciation on a straight-line basis. If the Kumasi contract is undertaken , less plan will be required but the surplus plant will be hired out for the period of the contract at a rental of GHS 6,000

4. It is the company’s policy to charge all contracts with nominal interest at 8% on estimated working capital involved in contracts. Progress payments would be made receivable from the contractee

5. Salaries and general cost of operating the small headquarters amount to about GHS 108,000 each year. There are usually ten contracts being supervised at the same time

6. Each of the two contracts is expected to last from June 2020 to December 2020 which, coincidentally is the company’s financial year

7. Site management is treated as a fixed cost

Required:

As a management accountant to the company, present comparative statements to show the net benefit to the company for undertaking the more advantageous of the two contracts.

Explain the reasoning behind the inclusion and omission from your comparative financial statement for each item given in the cost estimates and the notes relating thereto