Author Question: A simple random sample of 5 observations from a population containing 400 elements was taken, and ... (Read 148 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?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

Thyroid conditions may make getting pregnant impossible.

For a complete list of videos, visit our video library