Statistics Help @ Talk Stats Forum - Biostatistics
http://www.talkstats.com/
Epidemiology and biostatistics, public health research. GLM, logistic regression, survival analysis, clinical trials.enWed, 29 Mar 2017 12:41:55 GMTvBulletin60http://www.talkstats.com/images/misc/rss.pngStatistics Help @ Talk Stats Forum - Biostatistics
http://www.talkstats.com/
Predicting outcome with multiple groups
http://www.talkstats.com/showthread.php/69092-Predicting-outcome-with-multiple-groups?goto=newpost
Tue, 28 Mar 2017 17:14:25 GMTHi everyone,

I'm currently working with 3 different groups (3 disease populations) and I would like to predict which of the three groups they fall into based on a measurement we did. I was thinking that it should be something like multinominal logistic regression but how can I then get a vector out to predict the response in the future?

Best,

Eric
]]>BiostatisticsEric2014http://www.talkstats.com/showthread.php/69092-Predicting-outcome-with-multiple-groupsam i overadjusting?
http://www.talkstats.com/showthread.php/69083-am-i-overadjusting?goto=newpost
Mon, 27 Mar 2017 09:56:08 GMTmight sound silly but for my research topic I am looking into insulin resistance (IR) and dietary factors. We are measuring IR by the use of...might sound silly but for my research topic I am looking into insulin resistance (IR) and dietary factors. We are measuring IR by the use of HOMA2IR.., in my model I decided to adjust for diabetes status (normal, prediabetes, diabetes status)... do you think I am overadjusting ? I am asking because diabetes status has a VIF value in spss that is a bit above 3 (less than 4 for sure!) and I know that that might be a collinearity problem.
]]>Biostatisticsjkerr1http://www.talkstats.com/showthread.php/69083-am-i-overadjustingFinding data given sample mean and variance
http://www.talkstats.com/showthread.php/69081-Finding-data-given-sample-mean-and-variance?goto=newpost
Sun, 26 Mar 2017 23:56:34 GMTHello,
I have a problem, I am given the sample size, mean, variance, and I know it is normally distributed.
The question states that 160...Hello,

I have a problem, I am given the sample size, mean, variance, and I know it is normally distributed.
The question states that 160 individual's BMI were measured. The sample mean was 27.9 and the variance is 26.01 and it is normally distributed.

1. I am trying to find the standard deviation-- is the variance just the square root of the SD??

2. And then the percentage of individuals that fall between 22.8 and 33.

3. How many SD above the mean is 30?

4. what is the upper and lower bounds given a 95% CI?

Thank you, I feel like there is a simple way to calculate but for some reason I have been struggling. Any help would be so appreciated.
]]>Biostatisticsdorothy8http://www.talkstats.com/showthread.php/69081-Finding-data-given-sample-mean-and-variance