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ZSs

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    2015 Spring

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  1. Hey guyz,,, Thank you very much for your support. It really did help. I really appreciate it. Thank you all @ bsharpe269 @Vene @ username1824 @biotechie
  2. Thank you,,,,, Molecular Biology and Biotechnology. But I haven't studied Biochemistry. I heard that doing subject tests can increase the chance of being selected. Is it true?
  3. Hi,, I like to do a phd in molecular biology. And i hope to carry out my studies in USA. Do I need to take the GRE biochemistry test or the Biology test? Is it possible to do GRE biology test and still get selected to a molecular biology programme in a good university? Thank you so much,,,
  4. Hi,,,can u please explain me how to calculate standard deviation and standard error for a binomial distribution when you have several samples? For exapmple, I don't know the population size. I take a sample of 10 and check for a particular characteristic. Let's say number of successes for this sample is x. So the proportion of successes is x/n. Then I repeat this process for 3 times. That means I take 3 samples. Then I'll calculate the mean for these 3 samples. So how do I calculate standard deviation or standard error for this mean value? Eg: Sample 1 => x/n = x/10 =3/10 =30% Sample 1 => 30% +- a Sample 2 => 32% +-b Sample 3 => 32% +- c Mean = 31.33% +-d How do I calculate a,b,c and d? And what if I have different sample sizes for the three occasions? (having 10, 15, 8 instead of 10,10,10) Thank you very much for your help
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