« previous next »

Author Question: A random sample of 100 credit sales in a department store showed an average sale of 120.00 . From ... (Read 105 times)

strangeaffliction

  • Hero Member
  • *****
  • Posts: 660
on: Jun 24, 2018
A random sample of 100 credit sales in a department store showed an average sale of 120.00 . From past data, it is known that the standard deviation of the population is 40.00.
 a. Determine the standard error of the mean.
  b. With a .95 probability, determine the margin of error.
  c. What is the 95 confidence interval of the population mean?

Question 2

George Dantzig is important in the history of management science because he developed
 a. the scientific management revolution.
  b. World War II operations research teams.
  c. the simplex method for linear programming.
  d. powerful digital computers.


TheDev123

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. 4.00
b. 7.84
c. 112.16 to 127.84

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

Sandia ear-plug-sized samplers hang poised to sample gases relevant to climate and weather. Sandia ear-plug-sized samplers hang poised to sample gases relevant to climate and weather.
Sample hypoglycemic protocol. Sample hypoglycemic protocol.
Sample prescriptions of antibiotics for prophylaxis against infective endocarditis. Sample prescriptions of antibiotics for prophylaxis against infective endocarditis.
Average household size Average household size
Suppose that we have a sample space with five equally likely experimental outcomes: E1, E2, E3, ... Suppose that we have a sample space with five equally likely experimental outcomes: E1, E2, E3, ...
Sample hypnograms of children, young adults, and older adults Sample hypnograms of children, young adults, and older adults
Video: Introduction to filtration - filtrate formation and composition

For a complete list of videos, visit our video library