@how2stats Dear Dr How to include mean and median survival time with the output of a multivariate Cox proportional hazard analysis in SPSS (or SAS, if you have the syntax)? My model has 7 covariates. A hazard ratio for one covariate is therefore adjusted for other covariates in the model. The mean and median values given with Kaplan Meier (KM) curves are for unadjusted survival curves because KM allows only a one-covariate analysis (univariate). Thank you in advance.
which test should i use if I wanna test weather my catgorical variable which consists of 5 groups (created using two step cluster analysis) can predict the incidence of the disease?? so that I could see effect of each group (cox regression doesn't do it)
Hi The video was very helpful. Would it be possible if you could forward me the reference that suggests the sample size to be 400 participants to run a hoser and lemeshow test? Thanks Tom
Thank you for these very helpful videos :-). Can/should the Wald test be used to test for significance when performing binary logistic regression with data which I am treating as a population? I have been advised that inferential statistical tests are not appropriate with populations, so I'm confused whether to pay attention to the Wald test - particularly as it does not appear to have a straightforward relationship with the size of the coefficients/log odds. Thank you in advance for any answers!
If your data consist of the entire population of interest, you don't have to test anything for statistical significance. So, you can ignore the Wald statistic. Log odds can also be misleading as a measure of effect size, but are usually useful. I also show to calculate standardized beta-weights in logistic regression: ua-cam.com/video/z9ltC4tniYY/v-deo.html
thank you for the instruction video, it helped a lot. (I just noticed that your dependent variable isn't set to a nominal/ordinal level, is there any reason for having it set as scale measurement?)
wow..people in your model make a lot of money! do you have any videos about putting categorical variables into a logistic regression model? Also, what is the max # of variables I can put into a model? Is it the whole sample divided by 10 or the number in the smallest group divided by 10? Thanks for the vid!
first thanks for preparing this video but please making how to reg more than one independnt variables and how to check mulicollinarity and hettecdasticy and how to interprat with logistic regrassion model
Hi, I have not done a logit regression in a while and now I need to interpret marginal effects of a categorical independent variable to a dependent variable...my IV has three categories and is for three types of ethnicity...how do I interpret that?
Hello. I like your helpfull videos! What happens if there is no factor? E.i., I want to verify whether a binary choice differs from 50% (which would be random). Marine turtles had to chose between coastal or oceanic water.
@@how2stats there are only two choices: odour 1 or odour 2. Animal time spent in each odour is measured. How to test whether there is, in fact, a choice, i.e., that one odour was chosen more than 50% of the time?
Hi, I am confused with your way of defining a level of measurement, you defined all 3 variables as scale ( not nominal ) . can you please explain why? because most of the people define binary variables as nominal in spss. thanks
Credit default is a binary dependent variable (Yes/No). In the context of logistic regression, it is the dependent variable that defines the type of logistic regression you conduct. So, in this case, it is a binary logistic regression, and that's true, even though one or more of the independent variables may be measured on a ratio/interval scale.
@@how2stats so if I have a YES/NO variable as a dependent variable in binary regression analysis using SPSS. should i label it as NOMINAL or Scale in variable view section?
When running a long and short logistic regression to test for interaction do you compare the -2log*(likelihoodshort/likelihoodlong) and compare the a Chisq DF= (DF long - DF short)? If so how do you calculate the P-value specifically rather than compare to the critical value of ChiSq to determine whether you reject the null (ie reject that the additional covariates which I crossed have a multiplicative interaction?)
Hi there good sir! I did the same thing as you did, but no matter what I do, the "variables in the equation" section for block 1/step 1 does not appear.
Thanks for your good videos I've made a combined variable with 4 categories (if ceanti=0 and cepro=0 new=0. if ceanti=1 and cepro=0 new=1. if ceanti=0 and cepro=1 new=2. if ceanti=1 and cepro=1 new=3. I need to investigate the association between this variable and intention to smoke. And this combined variable is the one I am really interested in. There are also some demographic characteristics (they are al categoricall) I want to control for. How to run this logistic regression?
Hey, I have a question: I am testing the appearance of different words in four different regions. The regions are on an ordinal scale 1-4 and the values of the words are the frequencies I have found. I have no idea how to analyze this in a logistic regression. What is the best way to start?
Yes queen you nailed this🧚♀️
Your videos are sooo great, awesome, informative. Long live you Sir !
"Logistic regression is complicated already" 😆
@how2stats
Dear Dr
How to include mean and median survival time with the output of a multivariate Cox proportional hazard analysis in SPSS (or SAS, if you have the syntax)?
My model has 7 covariates. A hazard ratio for one covariate is therefore adjusted for other covariates in the model. The mean and median values given with Kaplan Meier (KM) curves are for unadjusted survival curves because KM allows only a one-covariate analysis (univariate).
Thank you in advance.
Dear Prof. If you could also talk on meeting the assumptions of binary logistic regression aswell.
Great thanks.
Excellent explanation!!!
Simple!
I do not understand why your "credit-default"variable-label is continuous? Should it not be categorical?
which test should i use if I wanna test weather my catgorical variable which consists of 5 groups (created using two step cluster analysis) can predict the incidence of the disease?? so that I could see effect of each group (cox regression doesn't do it)
It's only the first part of a multi-part series. The part 2 video starts several seconds before this one ends, so you should get the full sentence.
Hi
The video was very helpful. Would it be possible if you could forward me the reference that suggests the sample size to be 400 participants to run a hoser and lemeshow test?
Thanks
Tom
Thank you for these very helpful videos :-). Can/should the Wald test be used to test for significance when performing binary logistic regression with data which I am treating as a population? I have been advised that inferential statistical tests are not appropriate with populations, so I'm confused whether to pay attention to the Wald test - particularly as it does not appear to have a straightforward relationship with the size of the coefficients/log odds. Thank you in advance for any answers!
If your data consist of the entire population of interest, you don't have to test anything for statistical significance. So, you can ignore the Wald statistic. Log odds can also be misleading as a measure of effect size, but are usually useful. I also show to calculate standardized beta-weights in logistic regression: ua-cam.com/video/z9ltC4tniYY/v-deo.html
@@how2stats Thank you so much! Your videos are extremely helpful :-).
thank you for the instruction video, it helped a lot. (I just noticed that your dependent variable isn't set to a nominal/ordinal level, is there any reason for having it set as scale measurement?)
Thank you very much! This video is very helpful.
wow..people in your model make a lot of money! do you have any videos about putting categorical variables into a logistic regression model? Also, what is the max # of variables I can put into a model? Is it the whole sample divided by 10 or the number in the smallest group divided by 10? Thanks for the vid!
Why did you put gender with a scale measurement while it's a nominal variable??
love it. thanks for your kindness
first thanks for preparing this video but please making how to reg more than one independnt variables and how to check mulicollinarity and hettecdasticy and how to interprat with logistic regrassion model
Hi, I have not done a logit regression in a while and now I need to interpret marginal effects of a categorical independent variable to a dependent variable...my IV has three categories and is for three types of ethnicity...how do I interpret that?
Hello. I like your helpfull videos!
What happens if there is no factor? E.i., I want to verify whether a binary choice differs from 50% (which would be random). Marine turtles had to chose between coastal or oceanic water.
I'm not sure what you mean by "factor", in this context.
@@how2stats there are only two choices: odour 1 or odour 2. Animal time spent in each odour is measured. How to test whether there is, in fact, a choice, i.e., that one odour was chosen more than 50% of the time?
Where is your normal distribution tests? Why don't you explaine what to do if normality doesn't apply? Just wondering.
in logistic regression, normality is not an assumption you have to test because it doesn't assume a normal distribution in the sample
Hi, I am confused with your way of defining a level of measurement, you defined all 3 variables as scale ( not nominal ) . can you please explain why? because most of the people define binary variables as nominal in spss. thanks
Credit default is a binary dependent variable (Yes/No). In the context of logistic regression, it is the dependent variable that defines the type of logistic regression you conduct. So, in this case, it is a binary logistic regression, and that's true, even though one or more of the independent variables may be measured on a ratio/interval scale.
@@how2stats so if I have a YES/NO variable as a dependent variable in binary regression analysis using SPSS. should i label it as NOMINAL or Scale in variable view section?
nominal
When running a long and short logistic regression to test for interaction do you compare the -2log*(likelihoodshort/likelihoodlong) and compare the a Chisq DF= (DF long - DF short)?
If so how do you calculate the P-value specifically rather than compare to the critical value of ChiSq to determine whether you reject the null (ie reject that the additional covariates which I crossed have a multiplicative interaction?)
Great video! Thank you. I will do something like that with a database. Greetings from Nicaragua.
Hi there good sir!
I did the same thing as you did, but no matter what I do, the "variables in the equation" section for block 1/step 1 does not appear.
Thanks for your good videos
I've made a combined variable with 4 categories (if ceanti=0 and cepro=0
new=0.
if ceanti=1 and cepro=0
new=1.
if ceanti=0 and cepro=1
new=2.
if ceanti=1 and cepro=1
new=3.
I need to investigate the association between this variable and intention to smoke. And this combined variable is the one I am really interested in. There are also some demographic characteristics (they are al categoricall) I want to control for. How to run this logistic regression?
Do you also have anything on MULTINOMIAL logistic regression?
Good video. But why is this topic splitted on little pieces? It is very uncomfortable to jump each 5 minutes to videos from other people.
hello can you help i need to do a cross-validation with SPSS to evaluate a model can you explain to me how to do it thank you
Can you give the regression equation in some place as well ?
Hey, I have a question: I am testing the appearance of different words in four different regions. The regions are on an ordinal scale 1-4 and the values of the words are the frequencies I have found. I have no idea how to analyze this in a logistic regression. What is the best way to start?
PS: Intention to smoke (Yes or No) is the dependent variable.
and can you do one with forward:conditional method ?
im using spss 17,and i have no idea where is logistic regression...there is in add-ons..what should i do..anyone?
Thank you very much! Extremely helpful!
life saver! thanks you!
Thank you!
aah i really needed help with the categorical covariates
VERY HELPFULL
I love SPSS
Intro too long with unnecessary comments. Just show where it is.
Spit noise kills me.
Good video, but stop making spit noises in the mic
Now you have me paying attention to the smacking. lol
yeah, all his videos are like this, I can't watch, them, that spit sound drives me insane.
I don't even care. Either he knows what he's talking about or he doesn't. He can make any noises he wants at this point!
Your videos are really helpful and good, but your smacking is making me nauseous.
this video sucks. it cuts out in mid-sentence 5 min into the lesson. what use is that?
It is very good but, please
do not smack your mouth, that sound is ver irritating
I don't mean to disrespect and I really appreciate what you do, but noises that you make while talking / breathing are just disgusting.
Good info but STOP snapping your mouth! its annoying