Evidence Based Medicine pills
Evidence Based Medicine pills
The harmonic mean is the reciprocal of the arithmetic mean. It is calculated as the total number of observations divided by the sum of the reciprocals. It is used in situations in which it is necessary to average paths of equal length with different times, as well as to average multiples or quotients.
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.
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
The chi-square test for independence allows us to compare the proportions of two qualitative variables to see if they are related
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.