At large factory of pipe, approximately 30% of all pipework failures in are caused by operator error. (a) What is the probability that out of the next 20 pipework failures at least 10 are due to operator error? (b) What is the probability that no more than 4 out of 20 such failures are due to operator error?

At large factory of pipe, approximately 30% of all pipework failures in are caused by operator error. (a) What is the probability that out of the next 20 pipework failures at least 10 are due to operator error? (b) What is the probability that no more than 4 out of 20 such failures are due to operator error?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

At large factory of pipe, approximately 30% of all pipework failures in are caused by
operator error.
(a) What is the probability that out of the next 20 pipework failures at least 10 are due
to operator error?
(b) What is the probability that no more than 4 out of 20 such failures are due to
operator error?

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