« previous next »

Author Question: Nancy Joon, Inc has 1500 employees. A simple random sample of 81 employees was selected, and the ... (Read 82 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?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

A comparison of selected species of bacteria and archaea. A comparison of selected species of bacteria and archaea.
Instructions for Completing the CMS-1500 (02/12) Claim Form Continued Instructions for Completing the CMS-1500 (02/12) Claim Form Continued
Sample Items from the Brief Multidimensional Measure of Religiousness/Spirituality (BMMRS) Sample Items from the Brief Multidimensional Measure of Religiousness/Spirituality (BMMRS)
Selected Minerals Used for Pharmactherapy Selected Minerals Used for Pharmactherapy
Selected Crystalloid IV Solutions Selected Crystalloid IV Solutions
Insect with a Simple Brain Insect with a Simple Brain
Video: Wound Repair Animation

For a complete list of videos, visit our video library