Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

1 . (a) From past statistics on the production of an electronic component in a manufacturing plant, it is expected that the average defective rate

image text in transcribedimage text in transcribed
1 . (a) From past statistics on the production of an electronic component in a manufacturing plant, it is expected that the average defective rate for the component produced by the assembly line is 20 parts per million. Recently, the plant has implemented a new operating procedure for the assembly of this component. The management expects this new assembly procedure to further reduce the defective rate of the component assembly. In order to justify this improvement, a random sample of 20 shifts of the production line has been selected and the defective rate found in each shift recorded. The sample mean defective rate of the component and its standard deviation are 25 parts per million and 10 parts per million respectively. Assuming the defective rate in each shift of the assembly line is normally distributed,(ii) how large a sample shifts of production should be taken if the estimated error for mean defective rate is within 2 parts per million at 95% of confidence level ? [5 marks]

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image_2

Step: 3

blur-text-image_3

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Calculus (Single Variable)

Authors: Michael Sullivan

1st Edition

1464142912, 9781464142918

More Books

Students also viewed these Mathematics questions