View the step-by-step solution to:

Shorty's Muffler advertises it can install a new muffler in 30 minutes or less.

Shorty’s Muffler advertises it can install a new muffler in 30 minutes or less. However, the work standards department at corporate headquarters recently conducted a study and found that 20% of the mufflers were not installed in 30 minutes or less. The Maumee branch installed 50 mufflers last month.

 
If the corporate report is correct:

 

a. How many of the installations at the Maumee branch would you expect to take more than 30 minutes?
   
  Installation   

 

b.

What is the likelihood that fewer than eight installations took more than 30 minutes? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)

   
  Likelihood   

 

c.

What is the likelihood that eight or fewer installations took more than 30 minutes? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)

   
  Likelihood   

 

d.

What is the likelihood that exactly 8 of the 50 installations took more than 30 minutes? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)

   
  Likelihood



Top Answer

Great question... View the full answer

shorty's.png

Sign up to view the full answer

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

-

Educational Resources
  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question
Ask a homework question - tutors are online