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Someone knows how to perform the Cronbach's alpha in mathematica?

Oscar Rodriguez, corporación universitaria iberoamericana

Posted 9 years ago

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i'm trying to make statistics in mathematics, with information from a spreadsheet, but it is difficult to make this kind of calculations

POSTED BY: Oscar Rodriguez

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Posted 9 years ago

Hi Oscar, You can copy the formula for Cronbach's alpha in Mathematica almost verbatim from Wikipedia. It's used for consistency checks in psychometric tests, so we'll use the employee attitude example data set. data = N@ExampleData[{"Statistics", "EmployeeAttitude"}]; Then we just copy the formula. k = Length@First@data; x = Total /@ data; a = k/(k - 1) (1 - Sum[Variance@data[[All, i]], {i, k}]/Variance@x) 0.843143 To see how similar the formula is in Mathematica to the form on Wikipedia, we can view the Mathematica version in TraditionalForm.

POSTED BY: Michael Hale

Posted 9 years ago

thank you very much :)

POSTED BY: Oscar Rodriguez

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