« previous next »

Author Question: The manager of a grocery store has selected a random sample of 100 customers. The average length of ... (Read 173 times)

Chelseaamend

  • Hero Member
  • *****
  • Posts: 545
on: Jun 24, 2018
The manager of a grocery store has selected a random sample of 100 customers. The average length of time it took these 100 customers to check out was 3.0 minutes. It is known that the standard deviation of the checkout time is 1 minute. The 95 confidence interval for the average checkout time for all customers is _____.
 a. 3 to 5
  b. 1.36 to 4.64
  c. 2.804 to 3.196
  d. 1.04 to 4.96

Question 2

The starting salaries of individuals with an MBA degree are normally distributed with a mean of 40,000 and a standard deviation of 5,000 . What is the probability that a randomly selected individual with an MBA degree will get a starting salary of at least 47,500?
 a. .4332
  b. .9332
  c. .0668
  d. .5000


aruss1303

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jun 24, 2018
Answer to Question 1

c

Answer to Question 2

c


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?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Selected Drugs for Glaucoma Selected Drugs for Glaucoma
Selected Androgens and Anabolic Steroids Selected Androgens and Anabolic Steroids
Sample composition of maternal and paternal HLA haplotypes. Sample composition of maternal and paternal HLA haplotypes.
Sample prescriptions of antibiotics for dental infections. Sample prescriptions of antibiotics for dental infections.
Average Distribution of Incoming Solar Radiation Average Distribution of Incoming Solar Radiation
Which of the 3 structures shown below has the shortest bond length? Justify your answer. Which of the 3 structures shown below has the shortest bond length? Justify your answer.
Video: Glomerular filtrate rate: pressures that affect GFR, NFP & GFR and blood composition

For a complete list of videos, visit our video library