Answered: A parachute company sells safety…

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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Question

A parachute company sells safety devices that are designed to fire, releasing the reserve parachute, at a mean height of 350.5 m with a standard deviation of 11.5 m. The company recently updated the devices, which, the lead engineer suspects, has caused the standard deviation, a, to decrease. He measures the heights at which the devices fire for a random sample of 17 of the updated devices. The heights at which the devices fire have a sample standard deviation of 7.7 m. Assume the heights at which the updated devices fire follow a normal distribution. can the engineer conclude that the population standard deviation, G, is less than 11.5 m? To answer, complete the parts below to perform a hypothesis test. Use the 0.05 level of significance.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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