Biostatistics
- or -
Post a project like this$$
- Posted:
- Proposals: 8
- Remote
- #1946984
- Expired
Description
Experience Level: Intermediate
Dear ladies and gentlemen,
I wrote a manuscript for the paper PLOS ONE.
I‘m a ophthalmologist and wrote about:
Trends in corneal transplantation at the University Eye Hospital, 2004 - 2015. The reviewer like the paper but say that
I need hope with the statistical methods that used in data analyses in this manuscript:
The reviewer propose:“As you were comparing some continuous outcome across more than two years and more than two groups, one method should be considered is Analysis of Variance (ANOVA). However you have noticed the unequal variances across years and groups, which does not fit satisfactorily one of the assumptions for ANOVA. In such case, one method may be considered is to apply a data transformation, such as log, to the outcome variable and may refit an ANOVA model to the transformed data. If no transformation works, you may consider an alternation method or test that does not assume equal variance, e.g. Welch (modified) ANOVA, (non-parametric) Kruskal Wallis test.“
The reviewer say:“Please make justifications or seek advice from biostatistician“
Can you help me please?
Yours sincerely,
Tobias R.
I wrote a manuscript for the paper PLOS ONE.
I‘m a ophthalmologist and wrote about:
Trends in corneal transplantation at the University Eye Hospital, 2004 - 2015. The reviewer like the paper but say that
I need hope with the statistical methods that used in data analyses in this manuscript:
The reviewer propose:“As you were comparing some continuous outcome across more than two years and more than two groups, one method should be considered is Analysis of Variance (ANOVA). However you have noticed the unequal variances across years and groups, which does not fit satisfactorily one of the assumptions for ANOVA. In such case, one method may be considered is to apply a data transformation, such as log, to the outcome variable and may refit an ANOVA model to the transformed data. If no transformation works, you may consider an alternation method or test that does not assume equal variance, e.g. Welch (modified) ANOVA, (non-parametric) Kruskal Wallis test.“
The reviewer say:“Please make justifications or seek advice from biostatistician“
Can you help me please?
Yours sincerely,
Tobias R.
Tobias R.
100% (1)Projects Completed
1
Freelancers worked with
1
Projects awarded
0%
Last project
4 Apr 2018
Germany
New Proposal
Login to your account and send a proposal now to get this project.
Log inClarification Board Ask a Question
-
Hello. Is this task still available? Thanks.
614211
We collect cookies to enable the proper functioning and security of our website, and to enhance your experience. By clicking on 'Accept All Cookies', you consent to the use of these cookies. You can change your 'Cookies Settings' at any time. For more information, please read ourCookie Policy
Cookie Settings
Accept All Cookies