Using the paired T-Test to compare suppliers

Abstract

The manufacture of industrial products requires rigorous quality, which is why they need to be in compliance. It is therefore essential that two different suppliers present products within the same specifications. The aim of this article is to show a case study carried out in a company in the south of the state of Rio de Janeiro, which used the Paired T Test to compare two types of foam for hospital mattresses. The results showed that supplier 1 produces a foam below the specified thickness of 11 cm while supplier 2 produces a foam within the specified value, so supplier 1 would be rejected and supplier 2's service would be used.