« previous next »

Author Question: The manager of a grocery store has selected a random sample of 100 customers. The average length of ... (Read 106 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?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

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.

Mononucleosis is caused by the Epstein–Barr virus. Symptoms of the infectious disease are swollen pa Mononucleosis is caused by the Epstein–Barr virus. Symptoms of the infectious disease are swollen pa
Measuring the Weight and Length of an Infant Measuring the Weight and Length of an Infant
Selected Pediatric Drugs for Which Specific Indications and Dosage Guidelines Exist Selected Pediatric Drugs for Which Specific Indications and Dosage Guidelines Exist
Selected Drugs for Angina and Myocardial Infarction Selected Drugs for Angina and Myocardial Infarction
Sample prescriptions of drugs for oral fungal infections. Sample prescriptions of drugs for oral fungal infections.
Selected examples of variability in eukaryotic promoters Selected examples of variability in eukaryotic promoters
Video: Oxygen - hemoglobin dissociation curve & Hemoglobin's affinity with oxygen - acidity

For a complete list of videos, visit our video library