« previous next »

Author Question: A company has developed a new computer sound card whose average lifetime is unknown. In order to ... (Read 132 times)

ec501234

  • Hero Member
  • *****
  • Posts: 573
on: Jun 24, 2018
A company has developed a new computer sound card whose average lifetime is unknown. In order to estimate this average, 200 sound cards are randomly selected from a large production line and tested; their average lifetime is found to be 5 years. The 200 sound cards represent a:
 A. parameter.
  B. statistic.
  C. sample.
  D. population.

Question 2

You take a random sample of 100 students at your university and find that their average GPA is 3.1 . If you use this information to help you estimate the average GPA for all students at your university, then you are doing what branch of statistics?
 A. Descriptive statistics b. Inferential statisticsc. Sample statisticsd. Population statistics


ergserg

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Jun 24, 2018
Answer to Question 1

Analysis:
A. Incorrect This represents a sample.
B. Incorrect This represents a sample.
C. Correct. This represents a sample.
D. Incorrect This represents a sample.
ANSWER : C

Answer to Question 2

Analysis:
A. Incorrect. This is Inferential Statistics.
B. Correct. This is Inferential Statistics.
C. Incorrect. This is Inferential Statistics.
D. Incorrect This is Inferential Statistics.
ANSWER : B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

ec501234

  • Hero Member
  • *****
  • Posts: 573
Reply #2 on: Jun 24, 2018
Correct answers!


ergserg

  • Sr. Member
  • ****
  • Posts: 338
Reply #3 on: Jun 24, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Did you know?

The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

A speculum used to hold the vagina open in order to visualize the cervix. A speculum used to hold the vagina open in order to visualize the cervix.
Electroencephalography (EEG). To perform the EEG, electrodes attached to the patient’s head pick up Electroencephalography (EEG). To perform the EEG, electrodes attached to the patient’s head pick up
New England children like David, Joanna, and Abigail Mason (painted by an unknown artist around 1670 New England children like David, Joanna, and Abigail Mason (painted by an unknown artist around 1670
How to evaluate third-order determinants by Minors Method (Question 2) How to evaluate third-order determinants by Minors Method (Question 2)
Human civilization developed during the most recent interglacial stage Human civilization developed during the most recent interglacial stage
Students working around a computer Students working around a computer
Video: Complement Proteins Animation

For a complete list of videos, visit our video library