Auto pistons at Wemming Chung's plant in Shanghai are produced in a forging process, and the diameter is a critical factor that must be controlled. From samples sizes of 10 pistons produced each day, the mean and the range of this diameter have been as follows: Day Mean (mm) Range (mm)
1 156.9 4.2
2 153.2 4.6
3 153.6 4.1
4 155.5 5.0
5 156.6 4.5
a. What is the value of ˉˉx?
b. What is the value of ˉR?
c. What are the UCL ¯x and LCL ¯xusing 3σ? Plot the data.
d. What are the UCLR and LCLR using 3σ? Plot the data.
e. If the true diameter's mean should be 155 mm and you want this as your center (nominal) line, what are the new UCL ¯x and LCL ¯x ?

Afirm's before-tax cost of debt, rd, is the interest rate that the firm must pay on debt. because interest is tax deductible, the relevant cost of debt used to calculate a firm's wacc is the cost of debt, rd (1 – t). the cost of debt is used in calculating the wacc because we are interested in maximizing the value of the firm's stock, and the stock price depends on cash flows. it is important to emphasize that the cost of debt is the interest rate on debt, not debt because our primary concern with the cost of capital is its use in capital budgeting decisions. the rate at which the firm has borrowed in the past is because we need to know the cost of capital. for these reasons, the on outstanding debt (which reflects current market conditions) is a better measure of the cost of debt than the . the on the company's -term debt is generally used to calculate the cost of debt because more often than not, the capital is being raised to fund -term projects. quantitative problem: 5 years ago, barton industries issued 25-year noncallable, semiannual bonds with a $1,600 face value and a 8% coupon, semiannual payment ($64 payment every 6 months). the bonds currently sell for $845.87. if the firm's marginal tax rate is 40%, what is the firm's after-tax cost of debt? round your answer to 2 decimal places. do not round intermediate calcu

How much does a neurosurgeon can make most in canada? give me answer in candian dollar

Right medical introduced a new implant that carries a five-year warranty against manufacturer’s defects. based on industry experience with similar product introductions, warranty costs are expected to approximate 2% of sales. sales were $8 million and actual warranty expenditures were $42,750 for the first year of selling the product. what amount (if any) should right report as a liability at the end of the year?