A picture is worth a thousand words
There are three possible strategies o verify that a variable follows a normal distribution: methods based on hypothesis testing, those based on graphical representations and the so-called analytical methods.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Category Statistics
A tricky riddle
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.
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.
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…