MATLAB: An Introduction with Applications
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ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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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 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 manager's hours per week lost due to disputes regarding technical workers' superior attitudes that their colleagues are "dumb and dispensable".
| x2: | 8 | 5 | 2 | 5 | 9 | 4 | 10 | 3 |
Use a calculator with sample
| x1 | = |
| s1 | = |
| x2 | = |
| s2 | = |
What is the value of the sample test statistic? Compute the corresponding z or t value as appropriate. (Test the difference μ1 − μ2. Do not use rounded values. Round your final answer to three decimal places.)
(b) Find a 95% confidence interval for
μ1 − μ2.
(Round your answers to two decimal places.)
| lower limit | |
| upper limit |
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