Answers to 5334 Exam Spring 2018.docx - 5334 Spring 2018 Midterm EXAM Last Name First Name 1 You are leading a quality control unit at SPCU which

# Answers to 5334 Exam Spring 2018.docx - 5334 Spring 2018...

• Test Prep
• 5

This preview shows page 1 - 2 out of 5 pages.

5334 Spring 2018 Midterm EXAM Last Name / First Name1) You are leading a quality control unit at SPCU which produces widgets. Historically the proportion of defective widgets are 0.05. The below computes the probability of obtaining 0, 2 and 3 defective widgets out of 10 inspected widgets when probability of success is 0.05.dbinom(x=0,size=10,p=0.05) =0.5987369dbinom(x=2,size=10,p=0.05) =0.0746348dbinom(x=3,size=10,p=0.05) =0.01047506i)You are worried that the historical proportion might be increasing. Therefore you go ahead and collect 3sets of 10 widgets from shift 1,2 and 3 respectively. You observe 2, 0 and 3 defective widgets. What is theprobability of observing 2,0, and 3 defective items in these three different shifts if the historical proportion of defective items have not changed. 0.5987369*0.0746348*0.01047506=0.0004680949ii)If you are the manager, ….? There might be more than one right answer here, I am interested in the way you think.There might be more than one answer here but that does not mean anything goes. An acceptable answer: Iwould take one large sample, compute the average proportion of defective items as well as the standard deviation of defective items to execute a hypothesis test where the null hypothesis states that the average proportion is 0.05 or less.

#### You've reached the end of your free preview.

Want to read all 5 pages?

• Spring '17

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern