A Quality Control Engineer Wants to Determine What Proportion of Defective

question 23

Short Answer

A quality control engineer wants to determine what proportion of defective parts are coming off the assembly line. Past experiments based on large sample sizes show this proportion to be 0.19. What sample size does the engineer need in order to estimate this proportion with a margin of error of 0.12 with 90% confidence?
______________

---

Definitions:

Smelted

The process of extracting a metal from its ore by heating and melting.

Carload

A shipping term denoting the minimum quantity of cargo required for a shipper to qualify for a reduced rate.

Hormone-Free

Refers to animals raised without the use of growth hormones, often used in reference to meat or dairy products.

Stress-Free

A state or condition where an individual experiences no or minimal stress, leading to a sense of calm and tranquility.