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?
Definitions:
Nationwide Sample
A representative selection of individuals or entities from across an entire country, used for statistical analysis or opinion polling.
Gallup
Redefined as: A research-based, global performance-management consulting company known for its public opinion polls.
Research Polling
The process of collecting data and opinions from a sample of individuals to infer the preferences or behaviors of a larger population.
Hispanic Population
Refers to people in the United States who are from or have ancestors from Spanish-speaking countries, mainly in Latin America and Spain.
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