Is the central-limit-theorem true for all distributions? For what sample size is it true (what is meant with "large")?
If I have two samples, with one 30-times larger than the other, which nonparametric test statistics should be considered for checking the null of equal distribution? I am using Kolmogorov-Smirnov ...
I'm not a statistician, so I hope this question makes sense. I'm an EMT and we have patients known to be "frequent flyers". Example, we have a diabetic that we have seen 100+ times in 3 years. I have ...
How many samples should be taken to capture the mean and variance of the original set with given error?
I have a set $S$ of $N$ real numbers. I wanna calculate the mean $m$ variance $v$ of $S$. But since $N$ is too large, I do not want to use all of the numbers. Instead, I would like to sample $n$ ...
How to calculate sample size for simulation in order to assert some level of goodness in my results?
I am a stats newbie, so apologies in advance if I'm asking a braindead question. I have searched for answers to my question, but I find that many of the topics are either too specific, or quickly go ...
i've sampled a real world process, network ping times. The "round-trip-time" is measured in milliseconds. Results are plotted in a histogram: Ping times have a minimum value, but a long upper tail. ...