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Why you are not testing for constant variance? https://onlinecourses.science.psu.edu/stat501/node/367 https://onlinecourses.science.psu.edu/stat501/node/367
by darkhorn 10y ago
Why you are not testing for constant variance? https://onlinecourses.science.psu.edu/stat501/node/367 https://onlinecourses.science.psu.edu/stat501/node/367
- apathy 10y agoBecause, to quote Box, ‘To make the preliminary test on variances is rather like putting to sea in a rowing boat to find out whether conditions are sufficiently calm for an ocean liner to leave port!’ (Box 1953) Plot the residuals instead.