correlation

Hi everyone, I’m recently struggling with a situation below, may anyone be kind enough to offer me a helping hand please. Student / mins of leisure time / page studided / marks in exam A / 50 / 100 / 90 B / 55 / 85 / 80 C / 60 / 80 / 70 Now for student D, he has 50 mins leisure time and...

Hi, I am trying to find the agreement between 2 methods that estimate the size of a knee (CT and MRI). n brief, each knee can get a size from 1-7 where 1 represents the smallest size available and 7 represents the biggest size available. In my study, I have 100 different knees that were...

Hi, I have two data sets. In both sets there are 3 of the same variables (density, MOE and frequency). In addition to that, each set has one more variable (tension strength and bending strength). Since i can not measure both strengths on one piece, I would like to estimate the correlation (or...

In SPSS, is there a way to find out if there is a siginificant relationship between symptoms (on a scale from 0-3, with 3 = the worst) and hospital stay ("yes" or "no") are related?

Can I use chi-square test of independence if one variable is nominal and the other is ordinal, or do both have to be nominal?

1) If the correlation coefficient between two random variables X and Y is 0.5, then the correlation coefficient between 2X-4 and 3-2Y is? a. 1 b. 0.5 c. -0.5 d. 0 1) If the correlation coefficient between two random variables X and Y is 0.3, then the correlation coefficient between (2X+3)/5...

1) If the correlation coefficient between two random variables X and Y is 0.5, then the correlation coefficient between 2X-4 and 3-2Y is? a. 1 b. 0.5 c. -0.5 d. 0 1) If the correlation coefficient between two random variables X and Y is 0.3, then the correlation coefficient between (2X+3)/5...

The variable is called "externalizing behaviours" and it has the numbers 9,7,7,3,11,6,2,6,6,9. I assume that the numbers show the amount of externalizing behaviour because the question says it was an observation. Is this interval/ratio? I think it is interval (rather than ordinal) because 7 is...

Suppose X~exp(.67), Y~exp(.8), Z~exp(.43). X and Y are correlated with a correlation coefficient of -0.6. Again X and Z are correlated with a correlation coefficient of -0.6. How can I generate data from X, Y and Z by incorporating this correlation. I know if they were uncorrelated, I could...

I am trying to ascertain the relationship between three variables; two independent and one dependent so I'm fairly confident that a multiple regression would be the correct choice. However I'm not sure if this is correct because of the fact that I have repeated measures. I have repeated...

Hi, I am performing mediation analysis, and have first of all looked at the correlation between variables. The zero order correlation between X and Y is positive and significant. However in the mediation analysis, the direct effect of X on Y (after holding the mediator constant) has a...

Hello, I'd really appreciate if someone can help me with a particular problem, concerning the approach I should take in statistically analysing the results of questionnaire data concerning intensity of use of social media, on the one hand, and social relationships on the other. The...

I've been searching for some time for a correlation metric analogous to the Pearson correlation value for numerical vs numerical features, or Cramér's V for categorical vs categorical features, but this time for categorical vs numerical features. This is my toy data example in Python, where...

Hi, I just registered to find some answers to probably very simple questions.. I hope those are not answered too often in the forum, but my computer gives me an error when I try to use the search function (maybe due to corporate internet restrictions). Starting situation 1: 4...

Hi there, So ive got a sample size of 400 Uni students, measuring a correlation between stress and exercise levels in minutes, and I received a non-significant results. Can anybody help explain why this is the case? Im having trouble interpreting it.

I am currently working on a retrospective database study assessing the real-world effectiveness of a medication. I am faced with a few challenges. I have 3 sources of prescription data: pharmacy records, E-Prescribe database, and medication reconciliation information obtained from the nurse's...

Please please help me! Hello there :) It's probably really straight forward but I'm having a very hard time trying to find a relationship between variables. I have an variable (Self-esteem) and I'm trying to assess whether there is a causal relationship between low self-esteem and if they...

Greetings I have been assessing some of the relationships between EDTA extractable Pb Vs Pb in plants etc using regression analysis in minitab. I just found a study that did a correlation analysis instead providing the correlation coefficient and p-value in order to assess if the relationship...

About me: Medical student with minimal statistical knowledge or research experience Question related to: statistical regression/correlation analysis of a medical trial Trial design: Double blind, randomized controlled trial. Placebo vs vitamin with a few months between baseline and...

Hi, I wonder if it is possible to adjust for covariates when we use PROC CORR (correlation test) in SAS. Thanks!