New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here


by: Mrs. Oleta Okuneva


Mrs. Oleta Okuneva
GPA 3.74

Scott Stevens

Almost Ready


These notes were just uploaded, and will be ready to view shortly.

Purchase these notes here, or revisit this page.

Either way, we'll remind you when they're ready :)

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Scott Stevens
Study Guide
50 ?




Popular in Course

Popular in College of Business

This 2 page Study Guide was uploaded by Mrs. Oleta Okuneva on Saturday September 26, 2015. The Study Guide belongs to COB 191 at James Madison University taught by Scott Stevens in Fall. Since its upload, it has received 15 views. For similar materials see /class/214050/cob-191-james-madison-university in College of Business at James Madison University.

Popular in College of Business




Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 09/26/15
More Sa Exam mple Exam Questions Scott Stevens COB 191 r Answer The US Supreme Court once compared 6person juries and lZperson juries and declared that there is no discernable difference between the results reached by the two different sized juries Since jurors are not permitted to discuss the case with anyone until all of the testimony has been heard we will look at an initial secret ballot conducted by the jury immediately after the testimony has been completed Assume that the jurors are a random sample from a population in which 90 of all people would vote for conviction on this original ballot We will examine the question How likely is a conviction verdict on this first ballot Why is it appropriate to use the binomial distribution to solve this problem Why would the binomial distribution not necessarily be appropriate on a second or later ballot Many cases require a unanimous verdict by the jury members What is the exact probability of a unanimous guilty verdict for a sixperson jury A twelveperson jury Suppose that a simple majority of jury members is required for a guilty verdict What is the exact probability of a guilty verdict in a sixperson jury Atwelveperson jury Suppose you were asked to approximate your answer to part c by using the normal approximation to the sampling distribution Why can you not justifiably do so Apply the normal approximation to the sampling distribution to the lZperson jury problem anyway even though it is inappropriate Look at how your answer compares to the real one in part c a b 0 P F Notes On a real test you would not need to do the work for both 6 and 12 member juries but it s worthwhile to do so here for purposes of comparison You would also not be asked to solve problem c on the in class exam since doing so without BTNOMDIST is quite time consurn ing My answers here are intended as explanation as well as solution so they go on a bit Key points are boldface S7 d in the discussion below Each person is either a quotsuccessquot or quotfailurequot in his or her initial vote with success here being de ned as a conviction vote Since we view the jury as being a random sample from a population of which 90 would vote for conviction we have met the requirements of the binomial model We have each quottrialquot juror being a quotsuccessquot convict vote or quotfailurequot acquit vote all with the same probability of success 09 and all independent of one another since no discussion has yet taken place Note that the assumptions of the binomial are unlikely to be satis ed by later votes since the votes of some jury members may alter the probabilities of other jury members We39ll proceed by using the binomial model Since the jury has less than 1000 people l Excel s BTNOMDI ST function can handle it nicely For a six person jury the chance of a unanimous conviction vote with p 09 is BTNOMDIST6609false while for a 12 person jury the calculation is BTNOMDISTOZ1209false Remember the quotfalsequot tells Excel that you want exactly this many successes quottruequot means quotthis number of successes or less You should be able to do this particular problem by hand too See why Anyway the numbers come out to be 05314 for the sixperson jury and 02824 for the twelve person jury That is a conviction on the first ballot is almost twice as likely with a sixperson jury You shouldn39t be surprised Since in either case it takes only one quotacquittalquot vote to kill the 0 unanimous conviction vote it should be clear that we39re more likely to find an quotacquitquot vote in twelve people than we are to find one in six people Moral if most people think you39re guilty get as big a jury as you can To do the 12person jury problem by hand we use the binomial formula with p 09 n 12 and k the number of successes 12 The math gives 12 1209 0112 1 x 0912 x 1 0912 05314 as before Again note that this problem can t answer the question of what the jury39s final verdict will be If the first ballot is not unanimous more ballots must take place after discussion Since a person who voted quotconvictquot on the first ballot is more likely to vote quotconvictquot again than a person who originally voted quotacqui quot on the first ballot later ballots no longer satisfy the assumption that each quottrialquot has an equal chance of quotsuccessquot If a simple majority is sufficient for conviction we want for the 12person jury case PK 3 7 where K is the number of guilty votes In Excel the probability of 6 or less guilty votes is BINOMDIST61209TRUE The TRUE tells Excel to compute the probability of six g lei successes This answer is 0000541 The chance of 7 or more guilty votes is then 1 0000541 0r 0999459 This is because PK27 1 7 PK56 Think about it For a six personjury we proceed similarly We want PK z 4 1 PK 3 1 BINOMDIST3609TRUE 098415 This time ifmost people would convict you you re much more likely to get off with a smaller jury In our problem a smaller jury means that you re more than 29 times as likely to not have a conviction on the first ballot This problem could be done by hand using a formula similar to the one in part b The problem is that we would have to find the probabilities of 12 guilty votes as found in b 11 guilty votes 10 guilty votes 9 guilty votes 8 guilty votes and 7 guilty votes then add these six numbers together That s a lot ofwork by hand To use this approximation the expected number of successes and failures must be at least 5 But in our problem p 09 This means that the expected successes for a 12 personjury are 12 X 09 108 which is fine and the expected failures are 12 x 01 12 which is not ne In the case of a six person jury it s even worse We have 6 X 09 54 expected successes and 6 X 01 06 expected failures So we cannot use the technique in either case Note that if the case were one in which p 05 then we could do the 12 personjury case


Buy Material

Are you sure you want to buy this material for

50 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Amaris Trozzo George Washington University

"I made $350 in just two days after posting my first study guide."

Steve Martinelli UC Los Angeles

"There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."

Parker Thompson 500 Startups

"It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.