A measure with a pedegree
The sample size required to estimate a population mean depends on the desired level of confidence and precision, in addition on the variable’s variance in the population.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Read MoreA measure with a pedegree
If you doubt, better in the middle
The sample size required to estimate a population proportion depends on the desired level of confidence and precision, in addition on the value of the proportion in the population
Chi-square test for independence
The chi-square test for independence allows us to compare the proportions of two qualitative variables to see if they are related
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.
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.