« previous next »

Author Question: Nancy Joon, Inc has 1500 employees. A simple random sample of 81 employees was selected, and the ... (Read 84 times)

elizabeth18

  • Hero Member
  • *****
  • Posts: 559
on: Jun 24, 2018
Nancy Joon, Inc has 1500 employees. A simple random sample of 81 employees was selected, and the individuals in the sample were asked how much they contribute (monthly) to their retirement accounts. The sample mean, , was 150 with a standard deviation, s, of 45.
 a. Estimate the standard error of the mean.
  b. Develop an approximate 95 confidence interval for the population mean.

Question 2

A measure of the average value of a random variable is called a(n) _____.
 a. variance
  b. standard deviation
  c. expected value
  d. None of the answers is correct.


Joc

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. 4.86 (rounded)
b. 140.28 to 159.72

Answer to Question 2

c


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

Did you know?

Green tea is able to stop the scent of garlic or onion from causing bad breath.

Sample inventory order form. Sample inventory order form.
It is important for new employees to know the location of all fire extinguishers. (A) Pull the pin ... It is important for new employees to know the location of all fire extinguishers. (A) Pull the pin ...
Selected Drugs for Angina and Myocardial Infarction Selected Drugs for Angina and Myocardial Infarction
Performance of a delayed nonmatching-to-sample trial. Performance of a delayed nonmatching-to-sample trial.
ABO and Rh grouping using gelatin centrifugation. The blood sample above is AB negative as indicated ... ABO and Rh grouping using gelatin centrifugation. The blood sample above is AB negative as indicated ...
Productivity in Selected Industries in the Early 1990s Productivity in Selected Industries in the Early 1990s
Video: The Pressure Flow Model in a Plant

For a complete list of videos, visit our video library