a) A magazine collects data each year on the price of a hamburger in a certain fast food restaurant in various countries around the world. The price of this hamburger for a sample of restaurants in Europe in January resulted in the following hamburger prices (after conversion to U.S. dollars).

The mean price of this hamburger in the U.S. in January was $4.61. For purposes of this exercise, assume it is reasonable to regard the sample as representative of these European restaurants. Does the sample provide convincing evidence that the mean January price of this hamburger in Europe is greater than the reported U.S. price? Test the relevant hypotheses using  α = 0.05.

(Use a statistical computer package to calculate the P-value. Round your test statistic to two decimal places and your P-value to three decimal places.)

t= __

p- value = ___

b) The risk of developing iron deficiency is especially high during pregnancy. Detecting such a deficiency is complicated by the fact that some methods for determining iron status can be affected by the state of pregnancy itself. Consider the following data on transferrin receptor concentration for a sample of women with laboratory evidence of overt iron-deficiency anemia.

(a) Compute the values of the sample mean and median. (Round your answers to two decimal places.)

Which of the mean and median do you regard as more representative of the sample, and why?

choice a) The mean is always more representative of a sample.

choice b)The mean because it is not influenced by the three extreme values at the upper end of the distribution.  

choice c) The median because it is not influenced by the three extreme values at the upper end of the distribution.

choice d) The median is always more representative of a sample.

A study of randomly selected Americans found that of 1,792 men, 244 had cardiovascular disease (CVD) and of 2,007 women, CVD was prevalent in 135 of them. Conduct a hypothesis test to see if CVD prevalence is higher among men than women in America. Let men be group 1 and women be group 2.

A. Write the hypotheses for this test.

B. What is the test statistic?

C. What is the p-value?

D. Using α = 0.05, decide whether or not to reject the null hypothesis.

E. Based on your decision, is there evidence that CVD prevalence is higher among men than women in America?

the Unix/Linux commands

1. Enter the “date” command to print the current date and time. Also, try the “cal” command.
2. Enter the command “clear” to clear the screen.
3. Use the command “cat .bash_hisrtory” to view your startup file. Note that each shell has a different startup file, and since we’re using the BASH (Bourne-Again Shell), the startup file is .bash_history. (if you can’t find this file think about one way to display!)
4. Enter the “exit” command to close the terminal window.
5. Enter the command “who” to display all users currently logged onto the system.
6. Enter the commands “whoami” and “who am i” to display your own user information. Note the difference.

Whoami shows my username

7. Enter the “finger” command with your login name to display detailed information about your terminal. (note: if you can’t find finger command, ask your instructor to install it)
8. Change to the “/bin” directory.
9. Display all files (ls –l) from the “/bin” directory.
10. Change to your HOME directory.
11. Use the “cat” command to create a sample text file called “textfile1”. Enter several lines of text of your choice into that file. The output redirection “>” should be used with the cat command “cat > textfile1”.
12. Use the “cat” command to view the file you have just created. Then, use the “wc” command to display statistics information about that file (number of lines, words, and characters).
13. The output redirection can be used with any command. Try the following command which prints all the files in the “/bin” directory into the file output:
14. ls –la /bin > output

15. Use the “cat” command to view the contents of the “output” file. How can you display the contents one page at a time?
16. The output redirection “>” creates a file if it doesn’t exist, and over-writes its contents if the file exists. Try the following command which prints the lists of users into the “output” file we created earlier: who > output
17. Use the “cat” command to display the contents of the “output” file. You’ll notice that the previous contents have been over-written.
18. The output re-direction “>>” can be used to append contents to an existing file. Try this: “date >> output”. You’ll notice that the current date has been appended to the previous contents of the output file.
19. The “touch” command can be used to create an empty file. Try this: “touch myfile”. Check to make sure the file “myfile” has been created.
20. Try the “touch” command on an existing file “touch textfile1” or “touch output”. What is the effect?
21. Create a new file called “memo.txt” with the following information “Hello there, my name is …yourname….”.
22. Append the current date to the end of file “memo.txt”.
23. Invoke the calendar command and redirect its output to the file “memo.txt”.
24. Write a command to display statistics (lines, words, characters) about “memo.txt”.

1. Find the present values of the following cash flow streams at a 10% discount rate. Do not round intermediate calculations. Round your answers to the nearest cent.

   0

   1

   2

   3

   4

   5

   Stream A	$0	$100	$350	$350	$350	$300
   Stream B	$0	$300	$350	$350	$350	$100

   Stream A: $  

   Stream B: $  

2. What are the PVs of the streams at a 0% discount rate? Round your answers to the nearest dollar.

   Stream A: $  

   Stream B: $  

Your client is 23 years old. She wants to begin saving for retirement, with the first payment to come one year from now. She can save $12,000 per year, and you advise her to invest it in the stock market, which you expect to provide an average return of 7% in the future.

1. If she follows your advice, how much money will she have at 65? Do not round intermediate calculations. Round your answer to the nearest cent.

   $  

2. How much will she have at 70? Do not round intermediate calculations. Round your answer to the nearest cent.

   $  

3. She expects to live for 20 years if she retires at 65 and for 15 years if she retires at 70. If her investments continue to earn the same rate, how much will she be able to withdraw at the end of each year after retirement at each retirement age? Do not round intermediate calculations. Round your answers to the nearest cent.

   Annual withdrawals if she retires at 65: $

   Annual withdrawals if she retires at 70: $

South Pack is considering investing in a packaging machine that costs $99,000 to purchase. There will be an additional $9,500 in non-capital (one time) pre-tax expense to install the machine. The company receives $2.10 in revenue per package while incurring $0.45 in variable costs per package. South pack expects to produce 34,000 packages per year using this machine. The annual fixed costs of operating the machine are $25,000. The machine will have a salvage value of $18,000 at the end of its 7 year lifespan. The company will increase its net working capital by $17,850 immediately to support the operation of the new machine, which would be completely recovered after the machine’s useful life. The machine`s CCA rate is 25%, the firm`s tax rate is 37%, and it uses an 11% cost of capital. What is the machine’s NPV? Should South Pack acquire the machine?

Piedmont Company segments its business into two regions—North and South. The company prepared the contribution format segmented income statement as shown:

Required:

1. Compute the companywide break-even point in dollar sales.

2. Compute the break-even point in dollar sales for the North region.

3. Compute the break-even point in dollar sales for the South region.

(For all requirements, round your intermediate calculations to 2 decimal places. Round your final answers to the nearest dollar.)

Piedmont Company segments its business into two regions—North and South. The company prepared the contribution format segmented income statement as shown:

Required:

1. Compute the companywide break-even point in dollar sales.

2. Compute the break-even point in dollar sales for the North region.

3. Compute the break-even point in dollar sales for the South region.

(For all requirements, round your intermediate calculations to 2 decimal places. Round your final answers to the nearest dollar.)

The Bureau of Economic Analysis in the U.S. Department of Commerce reported that the mean annual income for a resident of North Carolina is $18,688 (USA Today, August 24, 1995). A researcher for the state of South Carolina wants to see if the mean annual income for a resident of South Carolina is different. A sample of 400 residents of South Carolina shows a sample mean annual income of $16,860 and the population standard deviation is assumed to known,  =$14,624. Use a 0.05 level of significance, the researcher wants to test the following hypothesis.

H0:  = 18,688 Ha:   18,688

a) Use confidence interval approach to test the hypothesis?

b)What is your conclusion?

C)What are three rejection rules (You have used confidence interval approach in Question 2)?

D)Do three rejection rules lead to the same conclusion? What is your conclusion?

Piedmont Company segments its business into two regions—North and South. The company prepared the contribution format segmented income statement as shown:

Required:

1. Compute the companywide break-even point in dollar sales.

2. Compute the break-even point in dollar sales for the North region.

3. Compute the break-even point in dollar sales for the South region.

(For all requirements, round your intermediate calculations to 2 decimal places. Round your final answers to the nearest dollar.)