Recent content by Davidk

Greetings I run a binary logistic regression. I try to choose among many many covariates I have these that are possible confounders and when building the regression line I think I tried to make a good coverage of these confounders and relevant covariates. I run the same regression for few...

Thank you hlsmith. Would you mean by that to make the dependent variable true positive rate (what I called sensitivity - e.g. the number of symptoms the software discovered out of the total number of symptoms for each vignette) and the categorical independent variable the softwares identity...

Thank you. By comparing means in this scenario you mean ANOVA? Is it okay that the variable is a proportion?

Hey everyone and thanks in advance for your attention I'm trying to compare the performances of 5 different softwares acting as diagnostic tools. all they do is asking the patient questions for symptoms. I have given each software 20 vignettes in which everyone has 20-40 symptoms the softwares...

Hello and thank you for your time. It's quite long so you could get the accurate picture I'm investigating the association between a (life time mean) vitamin level and the occurrence of a disease (yes/no). I am using a 4600 patients data set (after cleaned) among 160 developed the disease and...

It's correct. I would not be able determine if the change is due to the process or time. I'm looking for change over time. I'll try to preform a repeated measure analysis and to read a little bit (I'm not sure I understand the linear contrast issue) Thank you

Hey Karabiner, thank you for responding. The intervention is CBT session. There are 4 of those during the month I followed the patients but for now I'm not interested in checking how they interfered independently but more on did the process had an impact. The question is - my H0 is that along...

Hello, super - basic question, thanks in advance: I'm trying to analyze the impact of group session meetings on sleep quality of (preliminary 7, but around 28 subjects eventually) 7 different patients. Each morning they have assigned the time they slept (in minutets for instance) for a period...

oh I just noticed the sketch I did is not good! it should be three different treatment so in green its y=b2x+a2

The cells were a mixture from few mice that went through the same conditioning and after separated for three groups randomly the treatment applied

Treatments were assigned randomly. It's a basic science experiment in which I took cells from mice and put them through 3 different treatments and then checked one of their function (the y axis) in different time periods. every 30 minutes I checked for the groups. I expected the treatment to...

Hi all, I hope the thread is in it's place. I wanted to compare slopes between three different simple regression lines. The three data sets have the same x (time) and y (measured value) variables but each data set have gone through a different treatment and so the intercept and the slopes are...

Hi all, I hope the thread is in it's place. I wanted to compare slopes between three different simple regression lines. The three data sets have the same x (time) and y (measured value) variables but each data set have gone through a different treatment and so the intercept and the slopes are...