Answered: 0.05 inch. A random sample of 20 rings…

0.05 inch. A random sample of 20 rings have an average diameter of 2.1015 inch. What is the 95% two-sided confidence interval for the population mean diameter of rings. (1.0781 2 12 40)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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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

The diameter of a ring is known to have a normal distribution with standard deviation of
0.05 inch. A random sample of 20 rings have an average diameter of 2.1015 inch. What is
the 95% two-sided confidence interval for the population mean diameter of rings.
a)
b)
c)
(1.0781, 2.1249)
(2.0781, 2.1249)
(-2.0781, -2.1249)
Cannot determine with the given information.

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