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Superstore data: histogram promo

There was a recent promotion on the webshop of the superstore: buy two, get three. Your manager would like to know what the effect was on the number of items bought per order. To do this, you decide to draw two histograms: one for the number of items bought per order before the promo, and one histogram for after the promo.

This exercise is part of the course

Statistical Techniques in Tableau

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