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

question 199

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 critical value for testing if the population variances differ for preservatives I and II at the 5% level of significance?

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Definitions:

Transduction

The process of converting one form of energy into another, such as converting light waves into neural signals by the sensory organs.

Absolute Threshold

The smallest intensity of a stimulus that can be detected by an organism's sensory systems 50% of the time.

Signal Detection

A theory that aims to quantify the ability to discern between information-bearing patterns and random patterns that distract from the information.

Absolute Threshold

The absolute threshold refers to the minimum intensity of a stimulus that one can detect 50% of the time.