The why and wherefores
Calculating expected values. Calculating expected values is done by multiplying the marginals of the cell and dividing by the total of the table. This rule is reasoned.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Category Statistics
Studying or working?
Chi-square test for independence. Chi-square test for independence compares the proportions of two qualitative variables to determine whether or not they are independent.
Solomonic decisions
Chi-square for goodness of fit. Chi-square for goodness of fit allows us to infer whether a sample can come from a given population.
At a rough guess
Signs test. Signs test compares two medians using the direction of the values with respect to the mean and binomial probability.
…There are not all those who are
Data imputation. Data imputation includes a number of techniques for assigning theoretical values to variables with missing data.