A Bank Is Trying to Determine Which Model of Safe

question 83

Multiple Choice

A bank is trying to determine which model of safe to install.The bank manager believes that each model is equally resistant to safe crackers but sets up a test to be sure.He hires nine safe experts to break into each of the models,timing each endeavor.The results (in seconds) are given next,paired by expert.Let D be the difference: Time to break Safe 1 minus Time to break Safe 2. Which of the following hypotheses will determine if the two safes take,on average,the same amount of time to crack?

• A) H₀: µ_D ≤ 0,H_A: µ_D >0
• B) H₀: µ_D ≥ 0,H_A: µ_D <0
• C) H₀: µ_D ≠ 0,H_A: µ_D =0
• D) H₀: µ_D = 0,H_A: µ_D ≠0

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Definitions:

James-Lange Theory

A theory of emotion that suggests emotions occur as a result of physiological reactions to events.

Polygraph Test

A procedure that measures and records several physiological indicators such as blood pressure, pulse, and skin conductivity while the subject answers questions, used to infer truthfulness.

Overall Arousal Levels

A general state of alertness or activation of the nervous system, affecting physical and psychological responses.

Accuracy of Polygraphs

The degree to which polygraph tests can reliably and validly detect deception, often debated in terms of effectiveness.