Management: Lost Time In her book Red Ink Behaviors, Jean Hollands reports on the assessment of leading Silicon Valley companies regarding a manager’s lost time due to inappropriate behavior of employees. Consider the following independent random variables. The first variable x1 measures a manager’s hours per week lost due to hot tempers, flaming e-mails, and general unproductive tensions:

x1: 1 5 8 4 2 4 10 The variable x2 measures a manager’s hours per week lost due to disputes regarding technical workers’

superior attitudes that their colleagues are “dumb and dispensable”:

x2: 10 5 4 7 9 4 10 3

(i) Use a calculator with sample mean and standard deviation keys to verify that, x1 < 4.86, s1 < 3.18, x2 < 6.5, and s2 < 2.88.

(ii) Does the information indicate that the population mean time lost due to hot tempers is different

(either way) from population mean time lost due to disputes arising from technical workers’ superior attitudes? Use a 5 0.05. Assume that the two losttime population distributions are mound-shaped and symmetric.

AppendixLO1