An article on a comparison of two yeast extracts, baker\'s yeast and brewer\'s y

Question

An article on a comparison of two yeast extracts, baker's yeast and brewer's yeast, was published. Brewer's yeast is a surplus by-product obtained from a brewery; hence it is less expensive than primary-grown baker's yeast. Samples of both yeast extracts were prepared at four different temperatures (45, 48, 51, 54) in degrees Celsius and the autolysis yield (recorded as a percentage) was measured for each of the yeast-temperature combinations. The goal of the analysis was to investigate the impact of yeast extract and temperature on mean autolysis yield.

a) Identify the factors of the experiment:

b) Identify the levels of the factors:

c)Response variable:

d) How many treatments are there?

Explanation / Answer

a) The factors of experiment are : 4 different tempratures (45, 48, 51, 54) in degrees Celsius

b) The levels of the factors are : 2 type of yeast extracts ( baker's yeast and brewer's yeast )

c) Response Variable: The autolysis yield

d) There are 2*4= 8 treatments in the experiment.

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