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

Author Question: A simple random sample of 64 observations was taken from a large population. The population standard ... (Read 150 times)

Lisaclaire

  • Hero Member
  • *****
  • Posts: 569
on: Jun 24, 2018
A simple random sample of 64 observations was taken from a large population. The population standard deviation is 120 . The sample mean was determined to be 320 . The standard error of the mean is _____.
 a. 1.875
  b. 40
  c. 5
  d. 15

Question 2

Twenty-five percent of the employees of a large company are minorities. A random sample of 7 employees is selected.
 a. Define the random variable in words for this experiment.
  b. What is the probability that the sample contains exactly 4 minorities?
  c. What is the probability that the sample contains fewer than 2 minorities?
  d. What is the probability that the sample contains exactly 1 non-minority?
  e. What is the expected number of minorities in the sample?
  f. What is the variance of the minorities?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

epscape

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jun 24, 2018
Answer to Question 1

d

Answer to Question 2

a. x = the number of minority employees out of 7 or
y = the number of non-minority employees out of 7
b. .0577
c. .4449
d. .0013
e. 1.75
f. 1.3125


Lisaclaire

  • Member
  • Posts: 569
Reply 2 on: Jun 24, 2018
Wow, this really help

mjenn52

  • Member
  • Posts: 351
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Did you know?

According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

The Xenopus frog tadpole is a small, simple vertebrate. The Xenopus frog tadpole is a small, simple vertebrate.
Small and large intestines Small and large intestines
Prokaryotic cells are have a relatively simple structure Prokaryotic cells are have a relatively simple structure
Sample Problem from Raven’s Progressive Matrices Sample Problem from Raven’s Progressive Matrices
A sample flow sheet. A sample flow sheet.
Sample prescriptions of drugs for oral herpes infection. Sample prescriptions of drugs for oral herpes infection.
Video: Retina

For a complete list of videos, visit our video library