A scientist designed a medical test for a certain disease. Among 100 patients who have the disease, the test will show the presence of the disease in 96 cases out of 100, and will fail to show the presence of the disease in the remaining 4 cases out of 100. Among those who do not have the disease, the test will erroneously show the presence of the disease in 3 cases out of 100, and will show there is no disease in the remaining 97 cases out of 100.

What is the probability that a patient who tested positive on this test actually has the disease, if it is estimated that 20% of the population has the disease?

The status of a project after 100 days and after 150 days is as follows. (EV-Earned Value, PV-Planned Value, AC-Actual Cost in Rs). Determine the time and cost overruns and underruns of:

1. The project
2. Of each activity after 100 days and after 150 days.

Show all calculations.

with the current US national debt being $21 trillion dollars, if it was all paid of at once in $100 dollar bills, how many $100 dollars bills would it take and how much would those $100 dollar bills weigh in tons? this is the equvilant to how many loaded tractor trailer rigs (80000 # each) if the $100 bills were laid on the ground like a carpet how big of an area would it cover (square miles) assume that someone can count 5 bills per second and never stop. if everyone in Atlanta Georgia started counting the bills how long would it take to count all of the $100 bills?

Q8 Researcher A recruited a random sample of 100 pandas. Researcher B also recruited a random sample of 100 hippos. Suppose the health scores for the panda population has a mean of 100 and a standard deviation of 20. The health scores for the hippo population has a mean of 100 and a standard deviation of 50. Which researcher is more likely to get a sample mean of 80 or lower? A. Researcher A B. Researcher B

Q9 A sample of 100 people was taken from a population with a mean of 50 and a standard deviation of 20. What is the typical amount that the sample mean deviates from the population mean? A. 1 B. 1.5 C. 2 D. 2.5

You have 100 coins, and 99 of them are fair (equal probability of heads or tails). One of them is weighted and has a 90% probability of landing on heads. You randomly choose one of the 100 coins. Find the probability that it is a weighted coin, under the following scenarios: (Hint: if your calculator can’t compute 100!, R can, just type factorial(100))

(a) You flip it 10 times and lands on heads 10 times (b) You flip it 10 times and it lands on heads 9 times

(c) You flip it 20 times and it lands on heads 18 times (d) You flip it 100 times and it lands on heads 77 times

Describe this relationship shown in the table

300 words minimum - What, exactly, is a ‘barrier to entry” (also known as a barrier to entry and success? 2. How and why is it that firms in an “oligopoly” market structure often enjoy higher barriers to entry compared to firms that are perfect competitors? 3. In your opinion, what may be the three most powerful barriers to entry? Why? Please give an example of each of these three barriers to entry. 4. In your opinion, which three barriers may be the least powerful? Why? Please give an example of these three barriers to entry. 5. Please give three examples of how “consumer loyalty” may be used as a barrier to entry and success, and please try to use examples not previously discussed, if possible. 6. Please give three examples of how our legal system may be used as a barrier to entry and success, and please try to use examples not previously discussed, if possible. 7. What, exactly, is the definition of the term “price discrimination”? 8. What must a seller DO in order to engage in price discrimination? 9. Please give me two examples of price discrimination that were not previously discussed, preferably two examples that you have experienced first-hand. 10. In your examples, how did the seller “get away with it”? 2424

Ericsson is a large global company providing hardware, software, and related services for radio-access networks within mobile telecommunication systems. Assume that it is developing a new networking system for smaller, private telephone companies. To attract small companies, Ericsson must keep the price low without giving up too many of the features of larger networking systems. A marketing research study conducted on the company’s behalf found that the price range must be $50,000 to $75,000. Management has determined a target price to be $65,000. The company’s minimum profit percentage of sales is normally 15%, but the company is willing to reduce it to 12% to get the new product on the market. The fixed costs for the first year are anticipated to be $8,000,000. If sales reach 400 installed networks, the company needs to know how much it can spend on variable costs, which are primarily related to installation.

1. What is the amount of total cost allowed if the 12% profit target is allowed and the 400 installations sales target is met? Show the amount for fixed and for variable costs.

2. What is the amount of total costs allowed if the 15% normal profit target is desired at the 400 installations sales target? Show the amount for fixed and for variable costs.

3. Discuss the advantages of using a target costing model versus using cost-based pricing.

You and your friend Jack have different opinions about Tesla stock price. On Sep. 30, 2020, you did a short sale of Tesla stock at $429.01 for $1000 shares. The same day, Jack bought the Tesla stock at $429.01 for $1000 shares with margin. The initial margin and maintenance margin requirement for short sale is 150%. The initial margin and maintenance margin requirement for long on margin is 30% (assume no interest is charged on long on margin account). Below is the Tesla stock price in the next 2 days:

Oct. 01, 2020          $448.16

Oct. 02, 2020          $415.09

What is your expectation of Tesla stock price change in the future? (1 point)

What is Jack’s expectation? (1 point)

Please calculate your daily margin ratio and Jack’s daily margin ratio for each of the next 2 days

(Oct. 01 and Oct. 02). Please specify if margin call is received and how much money you or Jack

need to deposit into the account after the margin call. (6 points)

If you and Jack both decide to close the account (i.e., selling the stock or covering the short selling position) after receiving the first margin call instead of depositing more money into the account, please calculate returns for both of you. (4 points)