« previous next »

Author Question: What is the probability that no one is waiting or being served in the express checkout line? What ... (Read 107 times)

mmm

  • Hero Member
  • *****
  • Posts: 558
on: Jun 24, 2018
What is the probability that no one is waiting or being served in the express checkout line?
 
  What will be an ideal response?

Question 2

You are in charge of arranging the catering for a company meeting. Your company is responsible for paying for all meals ordered, so you don't want to order too many.
 
  Suppose that the expected number of people for the meeting is 84, with a standard deviation of 4 people. What is the fewest number of meals should you order so that the probability of having more people than meals is 5?


scrocafella

  • Sr. Member
  • ****
  • Posts: 346
Reply #1 on: Jun 24, 2018
Answer to Question 1

P(Express line is empty) = P(Y = 0 ) = 0.30

Answer to Question 2

P(X > k) = 0.05  PZ > (k - 84 ) / 4 = 0.05  (k - 84 ) / 4 = 1.645  k = 90.58  91 meals


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
Cyanobacteria of the (a) genus Synechococcus form (b) mats that line hot springs around the world. Cyanobacteria of the (a) genus Synechococcus form (b) mats that line hot springs around the world.
Johannes Gutenberg, Page from the Forty-Two-Line Bible, Mainz. Johannes Gutenberg, Page from the Forty-Two-Line Bible, Mainz.
Nomogram chart. This example shows a line drawn from a child’s height of 100 cm to his weight, 35 ... Nomogram chart. This example shows a line drawn from a child’s height of 100 cm to his weight, 35 ...
Line immunoassay (LIA), also recombinant immunoblot assay (RIBA) and Immuno-stripe, is similar to a ... Line immunoassay (LIA), also recombinant immunoblot assay (RIBA) and Immuno-stripe, is similar to a ...
(A) Pinch along jaw line from midline to lateral aspect. (B) Press St-6 at masseter attachment. (A) Pinch along jaw line from midline to lateral aspect. (B) Press St-6 at masseter attachment.
Find the equation of the normal line to f(x)=sinx+cosx at x = π. Find the equation of the normal line to f(x)=sinx+cosx at x = π.
Video: Summation - defined, spatial, temporal & AP generation or not

For a complete list of videos, visit our video library