CODEWITHSUNDEEP
matlabboxplotsignificance
user2037922
user2037922

Reputation: 33

MATLAB student-t test from boxplot input

In Matlab I created some boxplots of data. Now, I would like to do a statistical analysis with a Student-T test, to see if the difference is significant. Some data is paired, others not, with difference in variance. I think a two tailed test should be used. Is their a function in matlab to calculate the Student-T test from the boxplot, so I do not need to calculated the imput values again?

regards,

Vincent

Upvotes: 0

Views: 924

Answers (1)

Jonas
Jonas

Reputation: 74940

The boxplot figure itself only contains the information shown, i.e. the size of the box and the lines. It is theoretically possible to estimate the variance of the distribution from the inter-quartile-distance (you have to assume that your distribution follows a specific shape, though), but there is now way to guess the number of data points that went into the plot.

To get an accurate test, you're therefore much better off to re-calculate the input values.

Upvotes: 1

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