Thread: 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.

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

I have edited my entry.

....sufficient evidence to reject the hypothesis.