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Math Help - Assistance with problem 10.6:

  1. #1
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    Assistance with problem 10.6:

    10.6) Many law enforcement agencies use voice-stress analysis to help determine whether persons under interogation are lying. If the sound of frequency of a persons voice changes when asked a question, the presumption is that the person is being untruthful. For this situation, state the null and alternative hypothesis in verbal terms, then identify what would constitute a Type I error and a Type II error in this situation.


    Any assistance would be greatly appreciated.
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  2. #2
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    Type I occurs when you reject a null hypothesis that was true.
    Type II occurs when you accept a null hypothesis that was false.

    The null hypothesis is the basic statement that is true or false for the case.
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  3. #3
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    Question 10.6: Check to see if I have this correct:

    10.6: Many law enforcement agencies use voice-stress analysis to help determine whether persons under interrogation are lying. If the sound frequency of a personís voice changes when asked a question, the presumption is that the person is being untruthful. For this situation, state the null and alternative hypothesis in verbal terms, then identify what would constitute a Type I error and a Type II error in this situation.
    Answer:
    Ho: The sound of a personís voice changes when asked a question is not evidence that they are being untruthful
    H1: The sound of a personís voice changes when asked a question is evidence they are being untruthful
    Type I occurs when you reject a null hypothesis that was true.
    Type II occurs when you accept a null hypothesis that was false.

    The null hypothesis is the basic statement that is true or false for the case.
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