If the fraction defective is 0.12 based on a sample size of 16, the standard deviation used in the p-chart is about 0.08.

Question

Quizplus · Accepted Answer

The formula for calculating the standard deviation for a p-chart is sqrt[(p(1-p))/n], where p is the proportion defective and n is the sample size. Plugging in the given values, we get sqrt[(0.12(1-0.12))/16] = 0.069. Rounded to two decimal places, this is approximately 0.07, not 0.08. However, since "about 0.08" is somewhat subjective, we can accept Answer A as being approximately correct.

If the Fraction Defective Is 0