A buyer for a manufacturing plant suspects that his primary supplier of raw materials is overcharging.In order to determine if his suspicion is correct,he contacts a second supplier and asks for the prices on various identical materials.He wants to compare these prices with those of his primary supplier.He collected data on 6 different materials from both suppliers.He believes that the differences are normally distributed.Which of the following tests will be the most appropriate?

Question

Quizplus · Accepted Answer

The most appropriate test for comparing the prices of identical materials from two suppliers, assuming the differences are normally distributed and the data is paired (each material's price from one supplier is directly compared to its price from the other supplier), is the Paired t test. This test is specifically designed for comparing the means of two related groups to determine if there is a statistically significant difference between them.

A Buyer for a Manufacturing Plant Suspects That His Primary