User Gottfried Helms

9 votes

1 answer

3k views

What is PCA doing with autocorrelated data?

asked Nov 11, 2014 at 9:10

6 votes

1 answer

6k views

Estimating specific variance for items in factor analysis - how to achieve the theoretical maximum?

asked Nov 9, 2012 at 11:00

5 votes

1 answer

707 views

How is the proof that the Quartimax/Varimax-rotation converges?

asked Jan 9, 2012 at 8:57

4 votes

1 answer

4k views

Significance/confidence intervals for PCA or factor loadings - how can such be defined?

asked Jul 15, 2015 at 10:14

4 votes

3 answers

455 views

Significance test of whether participants have more friends of the same sex

asked Jul 13, 2011 at 17:41

2 votes

0 answers

879 views

Median-computation ("grouped median"). Problem with gmedian-computation in SPSS

asked May 27, 2015 at 13:15

1 vote

0 answers

1k views

Correct use of partial derivatives? (Example: polynomial regression)

asked Aug 4, 2011 at 18:43

1 vote

0 answers

193 views

Elliptic regression, basic conceptual question

asked Aug 20, 2011 at 2:05

1 vote

2 answers

137 views

What is the required test if I want to see, whether the means of a variable X for men and women are the same as in the population?

asked Feb 16, 2013 at 12:55

1 vote

0 answers

330 views

Chi-square of a sample with respect to a known population's marginal distribution?

asked Aug 3, 2013 at 6:10

1 vote

2 answers

110 views

How to model "amount of correlation between two metric items along a third metric item"?

asked Oct 10, 2014 at 10:38

1 vote

1 answer

186 views

T-test: is the difference of the means in my sample's two subgroups equal to a given difference of means?(SPSS)

asked Aug 11, 2015 at 0:28

1 vote

1 answer

542 views

Anova of metric items: SPSS and R display different square-sums and F-values. Which is the better philosophy?

asked Dec 19, 2015 at 9:41

1 vote

1 answer

47 views

$2$-step (paired) t-test - or what?

asked Apr 21, 2021 at 20:12

1 vote

0 answers

211 views

Test which test to use: (Student-) T-test or (Mann-whitney) U-test

asked Nov 22, 2021 at 15:09

0 votes

0 answers

27 views

Treatment: Mean AND variance should be optimized. What test to use/how to use (for instance t-test)?

asked Apr 30, 2022 at 8:02

Stack Exchange Network

16 Questions

What is PCA doing with autocorrelated data?

Estimating specific variance for items in factor analysis - how to achieve the theoretical maximum?

How is the proof that the Quartimax/Varimax-rotation converges?

Significance/confidence intervals for PCA or factor loadings - how can such be defined?

Significance test of whether participants have more friends of the same sex

Median-computation ("grouped median"). Problem with gmedian-computation in SPSS

Correct use of partial derivatives? (Example: polynomial regression)

Elliptic regression, basic conceptual question

What is the required test if I want to see, whether the means of a variable X for men and women are the same as in the population?

Chi-square of a sample with respect to a known population's marginal distribution?

How to model "amount of correlation between two metric items along a third metric item"?

T-test: is the difference of the means in my sample's two subgroups equal to a given difference of means?(SPSS)

Anova of metric items: SPSS and R display different square-sums and F-values. Which is the better philosophy?

$2$-step (paired) t-test - or what?

Test which test to use: (Student-) T-test or (Mann-whitney) U-test

Treatment: Mean AND variance should be optimized. What test to use/how to use (for instance t-test)?