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Medical errors are common in hospitals throughout the world. One possible causal factor is the long work hours of hospital personnel. In a pilot study investigating this issue, medical residents were encouraged to sleep 6-8 hours per night for a 3-week period instead of their usual irregular sleep schedule. The researchers expected, given previous data, that there would be one medical error per resident per day on their usual irregular sleep schedule.Suppose two residents participate in the program (each for 3 weeks), and chart review finds a total of 20 medical errors made by the two residents combined.
a. What test can be used to test the hypothesis that an increase in amount of sleep will change the number of medical errors per day?
b. Implement the test in Problem 7.90, and report a two-tailed P-value.
c. What would be the power of the type of test used in Problem 7.91 under these assumptions?
Which of the following statements is correct about the early exercise of American options?
A 20-year, $200,000 loan at a nominal annual interest rate of 12% convertible monthly is being paid off via the sinking fund method. The nominal annual interest rate earned on the sinking fund is 9% convertible monthly. What is the net amount of inte..
Swimkids is a swimsuit manufacturer. They sell swim suits at a selling price is $30 per unit. Swimkids variable costs are $18 per unit. Fixed costs are $81,100. Swimkids expects sales of $288,000 next year. What is Swimkids's margin of safety?
Consider the following cash flows: What is the IRR of the above set of cash flows? Your coin collection contains 57 1952 silver dollars.
You are celebrating your 35th birthday today and you want to start saving for your retirement at age 65. You want to be able to withdraw $15000 per year on each birthday for 12 years following your retirement; the first withdrawal will be on your 66t..
What is the opportunity cost of a checking account that requires a $500 minimum balance to avoid service charges? Assume an interest rate of 4%. If you earn a 9% return on your savings and are in the 28% tax bracket, what is your after-tax savings ra..
In the face of disappointing earnings results and increasingly assertive institutional stockholders, Eastman Kodak considered a major restructuring in 1993. Estimate the (after-tax) cost of capital (WACC) for the division. Estimate the value of the ..
The belief that businesses have the financial, technical, and managerial resources to support needed public and charitable projects is known as which argument?
Derive the functional relationship between the no arbitrage values of the two vertical spreads, C(K1)-C(K2) and C(K2)-C(K3)?
A premium bond that pays $60 in interest annually matures in seven years. The bond was originally issued three years ago at par. Which one of the following statements is accurate in respect to this bond today?
Twenty year self liquidating mortgage with five years remaining on the term. Interest rate is 8% and current five year treasury is 1.59%. What is the yield maintenance penalty? What if there were 10 years remaining and the treasury was 2.75%. What if..
from books of aggarwal bors following information has been extracted rs. sales 240000 variable costs 144000 fixed costs
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