Author Question: A simple random sample of 5 observations from a population containing 400 elements was taken, and ... (Read 115 times)

azncindy619

  • Hero Member
  • *****
  • Posts: 562
A simple random sample of 5 observations from a population containing 400 elements was taken, and the following values were obtained. 12 18 19 20 21 A point estimate of the population mean is _____.
 a. 5
  b. 18
  c. 19
  d. 20

Question 2

In a large university, 15 of the students are female. If a random sample of 20 students is selected,
 a. what is the probability that the sample contains exactly 4 female students?
  b. what is the probability that the sample will contain no female students?
  c. what is the probability that the sample will contain exactly 20 female students?
  d. what is the probability that the sample will contain more than 9 female students?
  e. what is the probability that the sample will contain fewer than 5 female students?
  f. what is the expected number of female students?



Natalie4ever

  • Sr. Member
  • ****
  • Posts: 335
Answer to Question 1

b

Answer to Question 2

a. .1821
b. .0388
c. .0000
d. .0002
e. .8298
f. 3



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

For a complete list of videos, visit our video library