Instruction 10-9
the Use of Preservatives by Food Processors Has

question 10

Multiple Choice

Instruction 10-9
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 A and 15 are treated with preservative B, and the number of hours until spoilage begins is recorded for each of the 30 cuts of meat. The results are summarised in the table below.
$$\begin{array} { c c } \text { Preservative A } & \text { Preservative B } \\\bar { X } _ { A } = 106.4 \mathrm { hours } & \bar { X } _ { \mathbf { B } } = 56.54 \mathrm { hours } \\S _ { A } = 10.3 \mathrm { hours } & S _ { \mathrm { B } } = 13.4 \mathrm { hours }\end{array}$$
-Referring to Instruction 10-9,what assumptions are necessary for a comparison of the population variances to be valid?

• A) Both sampled populations are normally distributed.
• B) Both samples are random and independent.
• C) Neither A nor B is necessary.
• D) Both A and B are necessary.

Recognize the importance and application of the scientific method in psychology.

Differentiate between basic and applied research in psychology.

Identify key historical figures and movements in the development of psychology.

Apply the goals of psychology to real-world scenarios and psychological research.

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Definitions:

Teratogens

Agents or factors that can cause developmental malformations or birth defects in an embryo or fetus when exposed during pregnancy.

Mutagens

Agents, such as chemicals or radiation, that can cause mutations by altering the DNA sequence within genes.

Carcinogens

Substances or exposures that are known to cause cancer or significantly increase the risk of developing cancer.

Preventable Hazard

A risk or danger to health and safety that can be minimized or eliminated through proactive measures, planning, and awareness.