A machine cuts plastic into sheets that are 50 feet (or 600 inches) long. Assume that the population of lengths is normally distributed with a population standard deviation of 0.4 inch. The company wants to estimate the mean length the machine is cutting the plastic to be within 0.018 inch. How many plastic sheets must the company sample in order to construct a 90% confidence interval for the population mean length? Do not round mid-calculation. However, use a critical value accurate to three decimal places. Round your final answer up to the next nearest whole number.

A machine cuts plastic into sheets that are 50 feet (or 600 inches) long. Assume that the population of lengths is normally distributed with a population standard deviation of 0.4 inch. The company wants to estimate the mean length the machine is cutting the plastic to be within 0.018 inch. How many plastic sheets must the company sample in order to construct a 90% confidence interval for the population mean length? Do not round mid-calculation. However, use a critical value accurate to three decimal places. Round your final answer up to the next nearest whole number.

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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