A product manager decides to set up a triangle test to determine if switching to

Question

A product manager decides to set up a triangle test to determine if switching to a new milk supplier results in a discernable difference in the company's mozzarella cheese. Samples are prepared and distributed to the panel for analysis. a) If the panel size is 27, what is the minimum number of panelists who must correctly identify the different sample to achieve a 95% confidence level that a difference exists? b After analysis by the panel, it is determined that a difference between the samples exists, and a second test must be constructed to determine the nature of difference between the two cheeses. Would it be more appropriate to construct another triangle test, or to instead construct a directional difference test? Briefly explain your choice. A brewery is looking for cost inefficiencies, and decides to examine the recipe for their beer with the most expensive ingredients, a very bitter double IPA. The brewer decides to investigate changing the bittering hops used in a recipe to a new variety of bittering hops that contains a higher alpha acid than the current variety, a allowing for a lower mass of hops needed for the recipe, and therefore lower costs. However, she wants to be certain that the change in bitterness is not perceptible to the consumer. Separate batches of beer are brewed with the two varieties hops, adjusting the amount used so that an equal amount of alpha acids are present in the boil for each beer. Samples are prepared of the standard beer (A) and the text beer (B) and one sample of each is presented to a panel as a directional difference test; 19 panelists are asked which beer is more bitter. a) Considering the design of the experiment, is the test a one-sided or two-sided directional difference test?

Explanation / Answer

Answer: The directional difference test is a one-sided.

Since the panellists are test which beer was bitterer?

Here, there are two beers they are standard beer and a test beer both are represented as A and B and consider 19 panellists are tested for more bitter.

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