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01-05-2016 05:40 PM

Dear SAS community,

I have a simple question that came from a reviewer of my mnuscript, but i can´t get my head around it. I performed a t-test where i compared two means. I found that there are signficant differences between the means. Therefore i created a table of each comparison and indicated the signficance difference using asterisks. However the editor of the journal has constantly asked me to state the first level risk associated wth the results i gave in the table of the t-test comparisons.

My questions is what is the reviewer asking for? that i state its type one error and the risk levels are less than 0.05? (p-value limit)?

Your support is highly appreciated.

Best regards,

Peter.

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Solution

01-05-2016
10:40 PM

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01-05-2016 06:50 PM

I'm not familiar with the term either and haven't come across it before and Google isn't helpful here either.

I suspect either it's

1) Translation or Typo issue

2) Something in the analysis/methodology section of your table/data that wasn't specified.

If you can, ask the editor for clarifications.

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01-05-2016 05:54 PM

Have you read the publication where someone else did a t-test? I would expect that to provide a pretty concrete example.

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01-05-2016 06:00 PM

Dear ballardw,

Yes i have read, but i have not come across that term before. Please kindy explain.

Best regards,

Peter

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01-05-2016 06:19 PM

Mutua wrote:

Dear ballardw,

Yes i have read, but i have not come across that term before. Please kindy explain.

Best regards,

Peter

In my admittedly limited reviewed article publications it appears that different fields, or sometimes even a single publication, have some of their own jargon. I don't recognize this particular phrase either which is why I would look in the publication to find something similar and see what I missed. Or see if the commenting editor would point to an example.

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01-05-2016 06:00 PM

We don't have enough information to answer your question. It depends on what type of analysis you undertook and what kind of data you have. The reviewer may be asking for an odds ratio or relative risk.

Given you said you made a table of "each comparison", I'm guessing that maybe T-Test isn't appropriate, since you would then be comparing multiple means independently. ANOVA may be more appropriate...but again, we don't have enough information.

Given you said you made a table of "each comparison", I'm guessing that maybe T-Test isn't appropriate, since you would then be comparing multiple means independently. ANOVA may be more appropriate...but again, we don't have enough information.

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01-05-2016 06:12 PM

Thankyou Reeza for the reply.

To explain i had a treatment where i added a biological control and the pathogen in the soil where potato plant was planted. The other treatment was where i added the pathogen alone and also a potato plant was included (all in pots). Each treatment was replicated 10 times. At the end of the experiment i extracted the pathogen and determined the population. The main intention was to detect if the biological control agent had any influence on the pathogen. I then performed a Ttest to compare the means between those treatments with pathogens and those without. The results indicated that adding the biocontrol led to higher pathogen numbers and therefore significantly different from that without the biological control.

The reviewer states that i should state the level of risks associated with the signficant differences between the means (if i get it right).

Its my hope that the question is abit clearer. Looking forward to your feedback.

Best regards,

Peter

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01-05-2016 06:21 PM

Is it level of risk or "first level of risk"? I would run your article by a statistician, I would have assume some sort of analysis to take advantage of the replication would have been used, instead of straight t-test on the means.

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01-05-2016 06:24 PM

Dear Reeza,

its "the first level of risk" that the editor is asking for.

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01-05-2016 06:32 PM

Dear Reeza,

What type of additioal analysis should i have performed to get this details on "first level risk"?

Regards,

Peter.

Solution

01-05-2016
10:40 PM

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01-05-2016 06:50 PM

I'm not familiar with the term either and haven't come across it before and Google isn't helpful here either.

I suspect either it's

1) Translation or Typo issue

2) Something in the analysis/methodology section of your table/data that wasn't specified.

If you can, ask the editor for clarifications.

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01-05-2016 10:43 PM

Thanks Reeza for the feedback. I really appreciate.

I will follow it up with the editor and see what can be done or if there are issues i missed in the table.

Best regards,

Peter.

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01-05-2016 09:44 PM

Maybe Reviewer is thinking you are using ANOVA and ask you what is your reference/base level .

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01-05-2016 10:46 PM

Thanks Keshan for the reply. I will follow up with the editor for further guidance on the issue.

Best regards,

Peter