Hamid Sharif-Nia

7 Questions 23 Answers 0 Followers

Questions related from Hamid Sharif-Nia

When do we use factor analysis based on Covariance matrix?

Dear researchers, When do we use factor analysis based on Covariance matrix instead of correlation matrix? Hamid

04 September 2018 986 3 View

What is difference between Shapiro–Francia test and Shapiro–Wilk test?

Dear researchers, 1- what is difference between Shapiro–Francia test and Shapiro–Wilk test? 2- Which one is more powerful for assessment of normal distribution? Best wishes Hamid

24 January 2018 2,180 3 View

How much must the correlation between the extracted factors in "exploratory factor analysis" be in order to be able to use orthogonal rotations?

Dear researchers greeting How much must the correlation between the extracted factors in "exploratory factor analysis" be in order to be able to use orthogonal rotations? For example: we have...

29 December 2016 1,075 4 View

Can “criterion validity; especially “predictive validity” be determined by the use of “receiver operating characteristic (ROC)”?

Dear researchers and collaborators I conducted a study with purpose of “evaluation of psychometric properties of X Scale…”. “X scale” is a scale that has been designed and it is still being used...

11 December 2016 5,290 6 View

What is proper way to data analysis when Standard deviation is more than mean?

Dear Researchers and Professors In a study, with case and control group, mean (SD) of variable A in the case group is 110 (SD= 190) and in control group 125 (SD= 225). Data indicate the valuable A...

17 March 2016 7,032 9 View

How do fit a structural model in confirmatory factor analysis when data is not normality distributed?

I assess construct validity of a tool for example: “X scale”. The factor structure of the X scale was examined by conducting an exploratory factor analysis by performing a principal components...

22 December 2015 4,669 11 View

How are the variables adjusted in repeated measurement test?

How do adjusted variables in repeated measurement test?

21 November 2015 3,167 9 View