Student’s t test for independent samples
Step by Step. Student’s t test for independent samples. Student’s t test allows comparing two independent means with small samples and without knowing the population variance.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Read MoreStudent’s t test for independent samples
Probability calculations with a normal distribution
Step by Step. Probability calculations with a normal distribution. A series of examples of how to do probability calculations with a normal distribution are shown, as well as the advantages of standardizing the data.
The brewer
Student’s t distribution. Student’s t probability distribution allows estimating the value of the population mean of a random variable that follows a normal distribution when the parameter is extracted from a small sample and the population variance is unknown. Something…
Like life itself
Pragmatic clinical trial. We all know how difficult it is to make a new drug available to people who can benefit from it. From the moment a promising molecule is identified and somebody thinks that it may be useful, until…
A strenuous effort, though unnecessary
Factors that condition the sample size. The need to perform a correct calculation of the sample size necessary for a study is reviewed, as well as the main factors that influence the sample required to demonstrate the effect considered relevant…