TABLE 10-14 the Use of Preservatives by Food Processors Has Become a Become

question 194

Essay

TABLE 10-14
The use of preservatives by food processors has become a controversial issue. Suppose two preservatives are extensively tested and determined safe for use in meats. A processor wants to compare the preservatives for their effects on retarding spoilage. Suppose 15 cuts of fresh meat are treated with preservative I and 15 are treated with preservative II, and the number of hours until spoilage begins is recorded for each of the 30 cuts of meat. The results are summarized in the table below.
Preservative I Preservative II
I = 106.4 hours II = 96.54 hours
SI = 10.3 hours SII = 13.4 hours
-Referring to Table 10-14, what is the largest level of significance at which a test of whether the population variances differ for preservatives I and II will not be rejected?

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Definitions:

Gas Filled Vacuoles

Structures within some cells that contain gas, which can provide buoyancy or maintain cell shape.

Pili

Hair-like structures on the surface of many bacteria that are involved in attachment to surfaces and in the transfer of genetic material.

Protist Structures

The varied and complex cellular organizations found in protists, ranging from single-celled to multicellular forms.

Eyespot

A pigmented organelle found in some algae and protozoa, allowing the organism to sense light direction.