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
Tag Confidence interval
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
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 tribulations of an interval
NNT’s confidence interval. The calculation and interpretation of the confidence intervals of the number needed to treat are described, including the negative extremes of the interval.</p The number needed to treat (NNT) is an impact measure that tells us in…
An impossible task
Resampling techniques: bootstrapping. Bootstrapping is a resampling technique that allows calculations that are impossible in another way when the sample is small.