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# 8 - www.lecturebook.com/homeworks/sho Assignm ent Stats 250...

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Assignment Stats 250 W11 HW 8 Graded Point Total: 26 out of 30 a. 4 out of 4 points State the null and alternative hypotheses for testing whether or not the training level has an effect on the mean time. Clearly indicate the description of these three parameters of interest for the hypotheses in the space provided. H 0 : _________________________ versus H a : _________________________________________ where ______ = ______________________________________________________________________ ______ = ______________________________________________________________________ ______ = ______________________________________________________________________ Your Answer: Required Assignment Stats 250 W11 HW 8 Question 1 (Chapter 16) A supervisor wants to study the relationship between employee training and time required to complete a job- related task. Three levels of employee training are considered: Beginner, Intermediate, and Advanced. Thirty new employees were randomly selected and each employee was randomly assigned to one of the three training levels. After the training was complete, the time (in minutes) it takes each employee to complete the task is recorded. Descriptive statistics and ANOVA results from SPSS are given below. The data set is time.sav . Descriptives Time N Mean Std. Dev. Std. Error 95% Confidence Interval for Mean Minimum Maximum Lower Bound Upper Bound 1 = Beginner 10 46.90 5.322 1.683 43.09 50.71 39 58 2 = Intermediate 10 43.20 6.563 2.075 38.51 47.89 33 53 3 = Advanced 10 28.80 4.541 1.436 35.55 42.05 31 46 Total 30 42.97 6.316 1.153 40.61 45.33 31 58 4/17/2011 www.lecturebook.com/homeworks/sho… lecturebook.com/homeworks/show/47 1/11

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