A Quality Control Expert Wants to Estimate the Proportion of Defective

question 49

Short Answer

A quality control expert wants to estimate the proportion of defective components that are being manufactured by his company. A sample of 300 components showed that 20 were defective. How large a sample is needed to estimate the true proportion of defective components to within 2.5 percentage points with 99% confidence?

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Definitions:

Strengths and Weaknesses

An assessment or analysis of the positive attributes and limitations of an entity, such as an organization, individual, or system.

Critical

Inclined to find fault or judge with severity, often too readily, involving analysis and evaluation.

Talk Therapy

A form of psychotherapy that involves discussing one's feelings, thoughts, and behaviors with a therapist to gain insight, resolve problems, or improve mental health.

Listening Therapy

A therapeutic approach that uses the act of listening to sound, music, or spoken word to improve physical or psychological conditions, often related to auditory processing issues or emotional wellbeing.