test of difference

1. Comparing two dependent, non-overlapping correlations

I have two questions regarding the comparison of two correlation coefficients from a single (paired / dependent) sample: Is it legitimate to use a test for comparing independent correlation coefficients instead? My understanding is that the only drawback is that this would compromise power...
2. What test?

Hi, It is 30 years since I did Stats 101, so I need a bit of help before I revisit Stats through LinkedIn Learning. I have attached an image on a spreadsheet whereby I have 10 leaders by 5 (A-E) variables, with the raw data and population proportion sample size. There is the REPORT which are...
3. Paired or Unpaired?

I recently concluded a clinical research which compared a certain parameter of one eye of a group of individuals to the the same parameter of the other eye of the same group of individuals. My statistical knowledge says these are unpaired (Independent) samples and as the parameter measured was a...
4. Would this have an effect on study results regarding statistics?

Dear all, I am in need of urgent brainstorming for my study design. To cut it short here is the scene: There is this study where I need to do some cognitive tests on patients (before /after treatment) and their native language might affect the results of these tests. If I give this tests in...
5. M

How can I determine if two graphs are statistically significantly different

Hi, I'm working on a medical research project and need some stats help. I have limited statistical knowledge but I understand that basics. I need help with the following... I have two graphs: A: y = -0.000003x^3 + 0.000664x^2 - 0.028609x + 0.333098 B: y = -0.000003x^3 + 0.000781x^2 -...
6. M

How to test if gender impacts mortality rates when already considering age

Hi, I am currently working on a research project where I'm analysing the impact of different factors on mortality. I have the past 10 years of data from a specific hospital and I have graphed the mortality curve by age separately for males and females. I can see that the one curve lies above...