A parachute company sells safety devices that are designed to fire, releasing the reserve parachute, at an average height of350.5 mwith a standard deviation of 12.3 m. The company recently upgraded the devices, which the lead engineer suspects has caused the standard deviation, o,decrease. Measure the heights at which devices are fired to obtain a random sample oftwoftheonpdated devices. The heights at which the devices fire have a sample standard deviation of8.9 m. Assume that the heights to which the upgraded devices shoot follow a normal distribution. Can the engineer conclude that the population standard deviation,o,is less than 12.3 m?To answer, complete the parts below to perform a hypothesis test. Use the significance level of 0.05. (a) Formulate the null hypothesish and the alternative hypothesish ,that you would use to perform the test. ho: 0 O S <口 OSO 0>0 020 0=0 00 X (b) Perform a chi-square test and find the p-value. This information will help you with your chi-square test: (no 1) yes • The value of the test statistic is given byx²= • The p-value is the area under the curve to the left of the value of the test statistic.

A parachute company sells safety devices that are designed to fire, releasing the reserve parachute, at an average height of350.5 mwith a standard deviation of 12.3 m. The company recently upgraded the devices, which the lead engineer suspects has caused the standard deviation, o,decrease. Measure the heights at which devices are fired to obtain a random sample oftwoftheonpdated devices. The heights at which the devices fire have a sample standard deviation of8.9 m. Assume that the heights to which the upgraded devices shoot follow a normal distribution. Can the engineer conclude that the population standard deviation,o,is less than 12.3 m?To answer, complete the parts below to perform a hypothesis test. Use the significance level of 0.05. (a) Formulate the null hypothesish and the alternative hypothesish ,that you would use to perform the test. ho: 0 O S <口 OSO 0>0 020 0=0 00 X (b) Perform a chi-square test and find the p-value. This information will help you with your chi-square test: (no 1) yes • The value of the test statistic is given byx²= • The p-value is the area under the curve to the left of the value of the test statistic.

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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