10.4 Do state laws that allow private citizens to carry concealedweapons result

Question

10.4 Do state laws that allow private citizens to carry concealedweapons result in a reduced crime rate? The author of a studycarried out is reported as saying "The strongest thing I could sayis that I don't see any strong evidence that they are reducingcrime."

a. Is this conclusion consistent with testing
    H0: concealed weapons lawsreduce crime
          versus
    Ha: concealed weapons lawsdo not reduce crime
or with testing
     H0: concealed weaponslaws do not reduce crime
          versus
    Ha: concealed weapons lawsreduce crime? Explain.

b. Does the stated conclusion indicate that the null hypothesis wasrejected or not rejected? Explain.

I just want to check answers: I believe that the answer toa is that the null hypothesis is that concealed weapons doreduce crime because it includes an equality (and the alternativeis that concealed weapons don't reduce crime). For partb I think that the null hypothesis was not rejectedbecause there is a lack of strong evidence.

Thank you!

Explanation / Answer

a)The null hypothesis typically proposes a general or defaultposition, such as that there is no relationship between twoquantities, or that there is no difference between a treatment andthe control. So I would agree with you that the appropriate null/alternatehypothesis are: H0: concealed weapons laws do not reducecrime
          versus
Ha: concealed weapons laws reducecrime? b) According to the author's conclusion, he failed to rejectthe null hypothesis due to the lack of supporting evidence/data. Iwould also agree with your answer.

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