This topic contains a solution. Click here to go to the answer

Author Question: On average, how many customers would you expect to see in each of these two lines at the grocery ... (Read 104 times)

kfurse

  • Hero Member
  • *****
  • Posts: 590
On average, how many customers would you expect to see in each of these two lines at the grocery store?
 
  What will be an ideal response?

Question 2

It has been found that 62.1 of all unsolicited third class mail delivered to households goes unread.
 
  If, over the course of a month, a household receives 150 pieces of unsolicited mail, what is the probability that the household discards more than 80 pieces of the mail without reading it? Use the normal approximation for the binomial distribution.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kjohnson

  • Sr. Member
  • ****
  • Posts: 330
Answer to Question 1

Expected number of customers in regular line = E(X) = 1.60
Expected number of customers in express line = E(Y) = 1.60

Answer to Question 2

P = 0.621, n = 150,  = E(X) = 93.15, 2 =Var(X) = nP(1 - P) = 35.3039, = 5.942
P(X > 80 ) = P(Z > -2.21 ) = 0.9864.




kfurse

  • Member
  • Posts: 590
Reply 2 on: Jun 24, 2018
Excellent


vickyvicksss

  • Member
  • Posts: 351
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

For a complete list of videos, visit our video library