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Math Help - Statistical report, please help

  1. #1
    Junior Member
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    May 2006
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    Statistical report, please help

    Toluene is a chemical that is commonly found in substances such as glue. Abuse of these substances can cause neurological symptoms. An experiment was carried out to investigate whether the inhalation of toluene had any effect on the brains of rats: six rats were exposed to toluene and five other (control) rats were not exposed to toluene. The concentration in (ng/g) of the chemical norepinephrine in the medulla regions of the brains of the toluene-exposed rats and the control rats are recorded below.

    Toluene-exposed rats
    543
    523
    431
    635
    564
    549

    control
    535
    385
    502
    412
    387

    Undertake an analysis of these data and write a brief statistical report of your analysis.

    My answer so far.

    Done the summary; which includes the aim of the analysis, not sure of model used (normal model?) and the key findings?? and its key interpretations??.

    Methods normal model?? and calculated a 95% t-interval and used a t-test to test the hypothesis that the mean difference is zero.

    Results
    Thought of using box plots.
    The t-test (using minitab) gave t = 2.36 on 10 degrees of freedom, p = 0.043


    Discussion
    We conclude that there is sufficient evidence to reject the hypothesis of no difference between the concentration of of norepinephrine in the medulla regions of toluene- exposed rats and control rats.
    Last edited by fair_lady0072002; July 23rd 2006 at 12:39 PM.
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  2. #2
    Grand Panjandrum
    Joined
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    someplace
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    Quote Originally Posted by fair_lady0072002
    Toluene is a chemical that is commonly found in substances such as glue. Abuse of these substances can cause neurological symptoms. An experiment was carried out to investigate whether the inhalation of toluene had any effect on the brains of rats: six rats were exposed to toluene and five other (control) rats were not exposed to toluene. The concentration in (ng/g) of the chemical norepinephrine in the medulla regions of the brains of the toluene-exposed rats and the control rats are recorded below.

    Toluene-exposed rats
    543
    523
    431
    635
    564
    549

    control
    535
    385
    502
    412
    387

    Undertake an analysis of these data and write a brief statistical report of your analysis.

    My answer so far.

    Done the summary; which includes the aim of the analysis, not sure of model used (normal model?) and the key findings?? and its key interpretations??.

    Methods normal model?? and calculated a 95% t-interval and used a t-test to test the hypothesis that the mean difference is zero.

    Results
    Thought of using box plots.
    The t-test (using minitab) gave t = 2.36 on 10 degrees of freedom, p = 0.043
    Check if this is a 1-sided or two sided p-value. It looks to me as though it is
    a two sided p-value.

    Discussion
    We conclude that there is sufficient evidence to reject the hypothesis of no difference between the concentration of of norepinephrine in the medulla regions of toluene- exposed rats and control rats.
    Why do you not reject the hypothesis? For what p-values would you have
    rejected the hypothesis?

    RonL
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  3. #3
    Junior Member
    Joined
    May 2006
    Posts
    31

    Statistical report, CaptainBlack

    I have edited my entry.

    ....sufficient evidence to reject the hypothesis.
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