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

08 September 2018 9,025 5 View

What is the appropriate effect size calculation for Chi-squared test?

05 June 2018 4,208 4 View

What is difference between Yates' correction and fisher exact test?

What is difference between Yates' correction and fisher exact test? When should I use Yates' correction? And fisher exact test? Best wishes

31 December 2017 2,622 4 View

No title

10 November 2017 3,627 8 View

How can i estimate the percentage of missing values in my data file in spss?

11 December 2016 4,235 5 View

When we use Second order confirmatory factor analysis?

08 September 2016 6,148 5 View

What is the suitable condition for exploratory factor analysis when internal consistency for all items (alpha Cronbach's) is .41?

Dear researchers and Professors I am going to run exploratory factor analysis for a questionnaire with 16 items. Prior to running an EFA, it was calculated the internal consistency with Cronbach's...

08 September 2016 3,266 7 View

No title

05 June 2016 2,730 1 View

No title

05 June 2016 1,994 11 View

What is difference of exploratory factor analysis and principal component analysis?

03 April 2016 6,284 2 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

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 3 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 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 test should i use in comparing the correlation between categorical and continuous variables?

Dear all, I have the variable (Surgery duration) represented by values in minutes and the variable (preoperative neuropraxia cases) represented as (Yes/No) values. I want to compare these two...

03 March 2021 5,427 5 View

Logistical regression using SPSS for a dichotomous dependent variable, with an independent variable of 1, 2, 5 and 10 seconds?

I have an experiment with 28 participants The independent variable is the times 1, 2, 5, and 10 used as the cross hairs during a task These 4 times were tested using 4 different blocks, each...

03 March 2021 9,692 2 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View