Asample containing years to maturity and yield for 40 corporate bonds are contained in the data file named corporatebonds (barron’s, april 2, 2012). a. what is the sample mean years to maturity for corporate bonds and what is the sample standard deviation? b. develop a 95% confidence interval for the population mean years to maturity. c. what is the sample mean yield on corporate bonds and what is the sample standard deviation? d. develop a 95% confidence interval for the population mean yield on corporate bonds.

Amanufacturing firm is considering overhauling the existing compensation strategy. currently every front line employee who works on the assembly line earns the same hourly wage. ideally, management would like to institute a new pay system that involves pay-for-performance. which of the following recommendations is both consistent with scientific management's general emphases and generally good advice for management of this firma. the firm should adopt a differential pay system with one pay level for average performance, and a higher level for good performance. b. the firm should adopt a differential pay system, but the firm should modify it from its original design and provide many different levels of pay associated with different performance levels. c. the firm should understand worker psychology and to focus on pay as the key motivator. d. all of the abovee. none of the above