Consider a production process that produces tires. A quality engineer has taken 15 samples, each containing 200 tires. The total number of defective tires over the 15 samples is 340. The sample standard deviation is
A) 0.005
B) 0.011
C) 0.022
D)0.028

Question

Consider a production process that produces tires. A quality engineer has taken 15 samples, each containing 200 tires. The total number of defective tires over the 15 samples is 340. The sample standard deviation is
A) 0.005
B) 0.011
C) 0.022 
D)0.028

Quizplus · Accepted Answer

The sample standard deviation for a proportion can be calculated using the formula: sqrt(p(1-p)/n), where p is the proportion of defectives and n is the sample size. Here, p = 340/(15*200) = 0.1133 and n = 200. Plugging these values into the formula gives approximately 0.022.

Consider a Production Process That Produces Tires