MAT 240: Applied Statistics home >E zyBooks catalogHelp/FAQ 8pothesis tests for the difference between two population meansCHALLENGE8.1.1: Hypothesis testing for two population means (left-tailed...

Extracted text: Search X Home TM 8-3 Challenge Activities: Means e X zy Section 8.1 - MAT 240: Applied S X Ô https://learn.zybooks.com/zybook/MAT-240-J4373-OL-TRAD-UG.22EWA/chapter/8/section/1?content_resource. A ary > MAT 240: Applied Statistics home > E zyBooks catalog Help/FAQ 8 pothesis tests for the difference between two population means CHALLENGE 8.1.1: Hypothesis testing for two population means (left-tailed t-test). ACTIVITY 3876741891676.oday? Start A company would like to know if efficiency can be improved through a training course for employees. A sample of employees is taken. The time taken for an employee to complete a task before training and after training is observed. Before Ater 31.7 Mean 33.1 Variance 16.81 12 25 Observations 30 30 Hypothesized Mean Dilerence 29 LSlat -2.282 0.051 p= Ex 1.234 P(Tet) one-tail LCritical one-tail P(Tet) two-tall t Critical two-tall -1699 0.025 -2.045 Confidence Level 95% 12 t = Ex:1 234 n = Ex: 9 Degrees of freedom: df = Point estimate for before training = Ex1 234 Point estimate for after training a = 80°F A G O D 4) A re to search (57 Prisc Inse Delete F10 F11 I F8 F9 F6 & Backspace 6. 7 8. D G D-D