Assumptions of Numerical Hypothesis Tests


Can anyone give me some explanation how to determine whether two standard deviations are “close enough” or not? With exaples, please…


Hello @catherinestav,

The standard deviation is the root square of variance, which indicates how close to the mean the data tend to be. You could compare two standard deviations if they share the same type of data, for example, the average population income of two states can be compared in order to check who has more average income and how much data is close to the average for each state.