Ajax Peanut Butter's Quality Control Allows 2 Percent of the Jars

question 57

Multiple Choice

Ajax Peanut Butter's quality control allows 2 percent of the jars to exceed the quality standard for insect fragments. A sample of 150 jars from the current day's production reveals that 30 exceed the quality standard for insect fragments. Which is incorrect?

• A)Normality of p may safely be assumed in the hypothesis test.
• B)A right-tailed test would be appropriate.
• C)We strongly suspect that quality control standards aren't met.
• D)Type II error is more of a concern in this case than Type I error.