DE 2021-05-19 11-47.pdf X Microsoft Edge x + X C O File | C:/Users/salah/Downloads/2021-05-19%2011-47.pdf Not syncing 1 of 3 Q + 2 0 Page view A Read aloud | V Draw " Highlight Erase They P (10) A pharmaceutical company makes tranquilizers. It is assumed that the distribution for the length of time they last is normal. A random sample of patients showed the following lengths of time for the effectiveness of the tranquilizer in hours: 2.7 ; 2.8 ; 3.0 ; 2.3 ; 2.3 ; 2.2 ; 2.8 ; 2.1 ; 2.4 Show your work. Construct a 90% confidence interval for the population mean length of time. You may use the table on page 8 of this exam or a spreadsheet program such as Microsoft Excel or something similar. Either way, you must show your relevant calculation. If you are using a spreadsheet program, you need to write down what you haved typed in and what value(s) it has returned. 1:56 PM Search for anything O Fi a 9 W A X 5/19/2021DE 2021-05-19 11-47.pdf X Microsoft Edge X + X C O File | C:/Users/salah/Downloads/2021-05-19%2011-47.pdf Q Not syncing 2 of 3 Q +2 0 Page view | A Read aloud | V Draw . Highlight ~