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Author Question: A company has developed a new engine whose average lifetime is unknown. In order to estimate this ... (Read 72 times)

cmoore54

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on: Jun 24, 2018
A company has developed a new engine whose average lifetime is unknown. In order to estimate this average, 100 engines are randomly selected from a large production line and tested; their average lifetime is found to be 11 years. The 11 years represents a:
 a. parameter. c. sample.
  b. statistic. d. population.

Question 2

If the coefficient of correlation is .4, the percentage of variation in the dependent variable explained by the estimated regression equation _____.
 a. is 40
  b. is 16
  c. is 4
  d. can be any positive value


leannegxo

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Reply #1 on: Jun 24, 2018
Answer to Question 1

B

Answer to Question 2

b


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