Witch techniques & methods that accure our mistakes on a questionnaire that has been distributed & answered ?!!

More Chemseddine Tidjani's questions See All

What does a negative Alpha cronbach in group of items mean ?

In my questionnaire analysis i have found a negative Alpha cronbach in one of the items group, where the others have a positive one. More clearly, i have 04 groups of items that reflect a 0.876...

03 April 2015 864 14 View

Are we obliged to re-test the reliability & validity of a previous questionnaire that has been tested before ?

The use of a previous questionnaire as a measurement tool that has taken the reliability & validity test; does it need to be re-validated? Otherwise, you can check more about the use of a...

02 March 2015 997 3 View

How can I treat the non-response questionnaires?

Can we extract the answered questions from each one? If one of the question that may answered by the respondent, may consider as his opinion in that only a question? Witch statistic basics prove...

07 August 2014 6,817 3 View

What did you think of studies about ICT & their influences on Cash management in the case of economic Algerian corporates & companies?

Is it interesting? As an example: " Measuring the impact of ICT use on cash management in economic companies ".

05 June 2013 6,064 0 View

How do you delete a duplicate pdf for the same paper on ResearchGate?

The first pdf file I uploaded had an error. So I uploaded an updated, corrected pdf of that paper with a different pdf name. I dpon't want the old copy to be download or read.

07 August 2024 9,508 1 View

Which test should be used to study association among demographic profile and awarness level?

i have to study the awareness and adoption level of cloud computing in a district of India. i also want to use association among demographic variables like gender, age, education, income etc and...

02 August 2024 2,420 3 View

Should I remove an item from a scale to raise Cronbach's alpha and McDonald's omega or is it better to leave it if they are both over .7 already?

Hello! I have this scale which had 10 items initially. I had to remove items 8 and 10 because they correlated negatively with the scale, and then I removed item 9 because Cronbach's alpha and...

01 August 2024 4,606 7 View

What is the ionic radius of Hydrogen anion? And how to know the exact ionic radii of the elements?

I'm trying to calculate the tolerance factors of the hydride perovskite and the value calculated by me and the reported values are contradictory. Need more clarity in using the correct ionic radii...

01 August 2024 2,614 1 View

Why 3 replicates for most biological assays? Is it enough to examine the data fits normal distribution?

Just bounced on me. Before statistically analysing significant difference, shouldn't we see if data fits normal distribution first? Is 3 replicates enough to testify the hypothesis of normal...

31 July 2024 8,141 13 View

Normality assumption for linear regression is The assumption of normality is whether for residual errors or predictor variavble?

When we conduct linear regression, there are several assumptions. The assumption of normality is whether the residual errors are normally distributed, not whether a predictor is normal?

31 July 2024 6,164 3 View

What should I do in this situation ?

I'm an undergraduate university student conducting research on the effects of internet use on depression and anxiety among undergraduate Ghanaian university students: Mediation role of Internet...

31 July 2024 2,979 3 View

How to change the version of the article full-text pdf file?

How to change the displayed full article text to its corrected version? In the file on the page of the journal where I published the article, there was an error in the text, the table is...

30 July 2024 3,229 2 View

Entropy measure and QSPR modeling in Graph Theor. How to construct the table for lengthy equation?

The entropy measured of molecular graphs plays a crucial rule. The network structures in some cases are very lengthy calculations to handle. Some author avoid to construct table where as most...

30 July 2024 3,126 0 View

How do I correct that wrong author's profile in my publication?

I am writing to request a correction regarding the affiliation of one of my co-authors, Donald Ho. Currently, the author's profile incorrectly lists an affiliation with The Hong Kong Polytechnic...

28 July 2024 6,824 0 View