Author Question: What is an operating characteristic curve and how is it related to the power curve for a ... (Read 152 times)

dejastew

  • Hero Member
  • *****
  • Posts: 562
What is an operating characteristic curve and how is it related to the power curve for a test?

Question 2

What is a power curve and how is it applicable to hypothesis testing?



mceravolo

  • Sr. Member
  • ****
  • Posts: 349
Answer to Question 1

The operating characteristic (OC) curve plots the probability that the hypothesis test will not reject the null hypothesis for assumed values for the population mean. The OC curve is the complement of the power curve. It is found by plotting  (on the vertical axis) versus the population mean (on the horizontal axis).

Answer to Question 2

The power of a test is the probability that the test will respond correctly by rejecting a false null hypothesis. By calculating the power of the test (1 - ) for several assumed values for the population mean and plotting the power (on the vertical axis) versus the population mean (on the horizontal axis), we arrive at the power curve. By looking at the power curve, we can get an idea of how powerful the hypothesis test is for different possible values of the population mean.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

dejastew

  • Hero Member
  • *****
  • Posts: 562

mceravolo

  • Sr. Member
  • ****
  • Posts: 349

 

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

For a complete list of videos, visit our video library