Can I do secondary post hoc analysis of previous study?

I have already conducted a study, however, after publication of this study, new question comes to my mind, can I do secondary analysis of this data to answer my new question?

10 November 2017 8,493 4 View

Is it important to get ethical approval for secondary data analysis?

I want to do secondary data analysis of my previous study; Is it important to get ethical approval for secondary data analysis?

10 November 2017 8,631 11 View

What is the appropriate sample size for this clinical trial?

I would like to conduct a clinical trial to do a head to head comparison between two drugs for safety and efficacy. How can I estimate the appropriate sample size?

09 October 2017 5,154 10 View

What are the minimum skill requirements needed for a person (student or physician) to become a researcher?

I have been asked this question by my colleagues (residents and physicians) several times. I would like to transmit this question to the experts like you to help them to get the appropriate answer.

02 March 2016 5,049 5 View

No title

31 December 2013 2,860 9 View

Can anybody tell me the differences between logistic regression test and linear regression test? When would we use each?

Regression test is an important test that has been used extensively in data analysis.Can anybody tell me the differences between logistic regression test and linear regression test? When would we...

04 May 2013 6,790 9 View

A patient with deep vein thrombosis under oral anticoagulants and INR of 2.9 wants to travel. How soon can he fly after a DVT?

A patient with deep vein thrombosis under oral anticoagulants and INR of 2.9 wants to travel. How soon can he fly after a DVT?

04 May 2013 516 13 View

Which is the best statistical program for data analysis SPSS or SAS?

Researchers tend to have varying needs for statistical software to perform data analysis and as the market has much statistical software. It is difficult to choose the statistical program. Which...

04 May 2013 8,294 21 View

How to use linear regression and correlation in quantitative method comparison studies?

Linear regression and correlation play an important part in the interpretation of quantitative method comparison studies. How to use linear regression and correlation in quantitative method...

04 May 2013 8,782 1 View

Can we start anticoagulants in a patient with pulmonary embolism who has massive hemoptysis? If the answer is no, how would we manage this patient?

...

04 May 2013 4,409 10 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

VIF very high, but correlation is low and coefficient is significant. Which one whould I choose?

Hello. I have a question whether if my coefficients (statistically significant) would be valid when VIFs are really high. In my model, there are independent variables(IV), moderating variables...

26 February 2021 956 13 View

How can I set up a good fit SEM model in AMOS?

I am trying to make an SEM model in AMOS for my dissertation but having some trouble with getting a good fit. I am looking for relationships between self-efficacy reported on a Likert scale and...

26 February 2021 8,642 4 View

Data Analysis K-S and S-W tests?

Hello, I have conducted analysis where the K-W and S-W have come out as p

25 February 2021 9,648 3 View

How could I process data in RCT to include it in meta-analysis?

I'm in the process of doing a meta-analysis and have encountered some problems with the RCT data. One of my outcom is muscle strength. In one study, I have three different measurements of muscle...

25 February 2021 7,603 3 View

Statistics: include groups of respondents made by one person for analysis?

Good morning, I could not find literature about this so I am asking. I am organizing data for a questionnaire (N=100) that foresees some personal questions like level of education. For the aim...

25 February 2021 2,090 4 View

Can we recognize signs of the "volatility clustering" property of a time series in its time domain plot?

My purpose is to recognize the volatility clustering property without statistical tests such as The Lagrange Multiplier (LM) test.

24 February 2021 4,150 3 View

I am looking for a simple software program to model 3D chemical bonds. The purpose is to generate high-quality graphical abstracts. Any suggestion?

Hello everyone: I am looking for a simple software program to model chemical bonds. The purpose is to generate a high-quality graphical abstract for a top leading journal in the field of...

23 February 2021 8,012 3 View