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

Author Question: The entities on which data are collected are _____. a. elements b. populations c. sets d. ... (Read 68 times)

NClaborn

  • Hero Member
  • *****
  • Posts: 560
The entities on which data are collected are _____.
 a. elements
  b. populations
  c. sets
  d. samples

Question 2

A survey of 100 businesses revealed that the mean after-tax profit was 80,000 . Assume the population standard deviation is 15,000:
 a. Determine the 95 confidence interval estimate of the mean after-tax profit for all businesses.
  b. Explain why you can use the confidence interval formula here, even though the population is not necessarily normal.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

babybsemail

  • Sr. Member
  • ****
  • Posts: 304
Answer to Question 1

a

Answer to Question 2

a. LCL = 77,060 and UCL = 82,940.
b. By the Central Limit Theorem, as long as n is large (and 100 is considered large), the sample means have an approximate normal distribution.





 

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

For a complete list of videos, visit our video library