« previous next »

Author Question: A multiple-choice test has 30 questions. There are 4 choices for each question. A student who has ... (Read 45 times)

kwoodring

  • Hero Member
  • *****
  • Posts: 560
on: Jun 24, 2018
A multiple-choice test has 30 questions. There are 4 choices for each question. A student who has not studied for the test decides to answer all questions randomly. What type of probability distribution can be used to figure out his chance of getting at least 20 questions right?
 
  A) Binomial distribution B) Poisson distribution
  C) Hypergeometric distribution D) None of the above.

Question 2

On the average, 1.8 customers per minute arrive at any one of the checkout counters of a grocery store. What type of probability distribution can be used to find out the probability that there will be no customer arriving at a checkout counter?
 
  A) Binomial distribution B) Poisson distribution
  C) Hypergeometric distribution D) None of the above.


macmac

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Jun 24, 2018
Answer to Question 1

A

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Keep Calm and Do the Practice Test Keep Calm and Do the Practice Test
Schematic drawing of a permeation test cell used to measure the permeation rate of chemicals through ... Schematic drawing of a permeation test cell used to measure the permeation rate of chemicals through ...
How to solve application problems containing quadratics (Question 2) How to solve application problems containing quadratics (Question 2)
Statistics Question: A swim team Statistics Question: A swim team
Economics question Economics question
economic question economic question
Video: Asthma Treatment

For a complete list of videos, visit our video library