TABLE 10-3. The use of preservatives by food processors hasbecome a controversia

Question

TABLE 10-3. The use of preservatives by food processors hasbecome a controversial issue. Suppose 2 preservatives areextensively tested and determined safe for use in meats. Aprocessor wants to compare the preservatives for their effects onretarding spoilage. Suppose 15 cuts of fresh meat are treated withpreservative A and 15 are treated with preservative B, and thenumber of hours until spoilage begins is recorded for each of the30 cuts of meat. Referring to Table 10-3, what assumptions arenecessary for a comparison of the population variances to bevalid?
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.

Explanation / Answer

a. Both sampled populations are normally distributed. b. Both samplesare random and independent. c. Neither (a) nor (b) is necessary. d. Both (a) and (b) are necessary.

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