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IND 605 (15)
Lecture

Session 20-Exercises.pdf

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Department
Industrial Engineering
Course
IND 605
Professor
Cory Searcy
Semester
Fall

Description
(1) (2) 1 (b) y  y t S (1/n ) (1/n )    1. 2. /2, 1 2 2 p 1 2 1 2 y 1.y t2. /2,1n 2n 2 p ( 1/n )1 (1/n ) 2 2 (3) To obtain the p-value: http://www.statdistributions.com/f/ (4) A regional opera company has tried three approaches to solicit donations from 24 potential sponsors. The 24 potential sponsors were randomly divided into three groups of eight, and one approach was used for each group. The dollar amounts of the resulting contributions are shown in the following table. Approach Contributions (in $) 1 1000 1500 1200 1800 1600 1100 1000 1250 2 1500 1850 2000 1200 2000 1700 1800 1900 3 900 1000 1200 1500 1200 1550 1000 1100 Do the data indicate that there is a difference in results obtained from the three different approaches? Use  = 0.05. Minitab Output One-way ANOVA: Contribution versus Approach Analysis of Variance for Contribution Source DF SS MS F P Approach 2 1395833 697917 9.59 0.001 Error 21 1529063 72813 Total 23 2924896 There is a difference between the approaches. 3 (5) 4 (6) The yield of a chemical process is being studied. The two most important variables are thought to be the pressure and the temperature. Three levels of each factor are selected, and a factorial experiment with two replicates is performed. The yield data follow:
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