This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The entities on which data are collected are _____. a. elements b. populations c. sets d. ... (Read 71 times)

NClaborn

  • Hero Member
  • *****
  • Posts: 560
on: Aug 1, 2018
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
Reply #1 on: Aug 1, 2018
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.


NClaborn

  • Hero Member
  • *****
  • Posts: 560
Reply #2 on: Aug 1, 2018
TY


babybsemail

  • Sr. Member
  • ****
  • Posts: 304
Reply #3 on: Aug 1, 2018
You're welcome


« previous next »
 

Did you know?

Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

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?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Nitrogen fluxes in Sycamore Creek, Arizona (data from Grimm 1988). Nitrogen fluxes in Sycamore Creek, Arizona (data from Grimm 1988).
Lake position in the landscape and proportion of water received as groundwater (data from Webster et Lake position in the landscape and proportion of water received as groundwater (data from Webster et
Summary of US Census Data Summary of US Census Data
Air-Temperature Data Air-Temperature Data
Periodic table of the elements Periodic table of the elements
Find a quadractic equation that models the data in standard form Find a quadractic equation that models the data in standard form
Video: Glomerubular filtrate rate -pressures that affect GFR and net filtration pressure

For a complete list of videos, visit our video library