The Use of Preservatives by Food Processors Has Become a Controversial

question 278

Multiple Choice

The use of preservatives by food processors has become a controversial issue.Suppose 2 preservatives are extensively tested and determined safe for use in meats.A processor wants to compare the preservatives for their effects on retarding spoilage.They will choose to use the preservative that can keep the meat fresh for the longest amount of time.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.Suppose the variability of the number of hours until spoilage is the same for meat treated by both preservatives,but the normal probability plots reveal that the number of hours until spoilage is right-skewed for the 15 cuts treated by preservative I and left-skewed for the 15 cuts treated with preservative II.Which of the following tests will be the most appropriate?

• A)Pooled-variance t test.
• B)Paired t test.
• C)Wilcoxon rank sum test.
• D)Levene's test.

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Definitions:

Aggregate Function

A computational method used in databases to perform a calculation on a set of values, returning a single value.

Standard Deviation

A measure of the amount of variation or dispersion in a set of values, indicating how much the values differ from the average.

Compound Criterion

A combination of multiple criteria used to filter or evaluate data in databases and software applications.

Start Date

The specific day on which an event begins or is scheduled to begin.