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A camera that detects liars. According to New Scientist
Chapter 7, Problem 123SE(choose chapter or problem)
A camera that detects liars. According to New Scientist (Jan. 2, 2002), a new thermal imaging camera that detects small temperature changes is now being used as a polygraph device. The U.S. Department of Defense Polygraph Institute (DDPI) claims the camera can correctly detect liars 75% of the time by monitoring the temperatures of their faces.
a. Give the null hypothesis for testing the claim made by the DDPI.
b. What is a Type I error for this problem? A Type II error?
Questions & Answers
QUESTION:
A camera that detects liars. According to New Scientist (Jan. 2, 2002), a new thermal imaging camera that detects small temperature changes is now being used as a polygraph device. The U.S. Department of Defense Polygraph Institute (DDPI) claims the camera can correctly detect liars 75% of the time by monitoring the temperatures of their faces.
a. Give the null hypothesis for testing the claim made by the DDPI.
b. What is a Type I error for this problem? A Type II error?
ANSWER:Solution
Step 1 of 2
a) We have to write the null hypothesis for the claim
Here the claim is that the camera can correctly detects the liars
The the null hypothesis is the camera can correctly detects the liars 75% of the time
Then