Explain Duo-Trio test and ranking test for sensory evaluation of food.

The Duo-Trio test and the Ranking test are two common methods used in sensory evaluation, particularly in the food industry, to gather information about the sensory attributes of food products. Here's an explanation of each:

1. Duo-Trio Test:

   The Duo-Trio test is a discriminative method used to determine whether there is a detectable difference between two samples. It is often used when a __________ ________ _____ ___ _____ ____ ________ _________.
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