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Author Question: A company has developed a new computer sound card whose average lifetime is unknown. In order to ... (Read 169 times)

ec501234

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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

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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


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ec501234

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Reply #2 on: Jun 24, 2018
Correct answers!


ergserg

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Reply #3 on: Jun 24, 2018
Great! Please up vote :D


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