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The burning rates of two different solid-fuel propellants used in air crew escape systems are being studied. It is known that both propellants have approximately the same standard deviatio of burning rate; that is o, = 02 = 3 centimeters per second. Two random samples of n = 20 and n2 = 20 specimens are tested; the sample mean burning rates are = 18 centimeters per second and x, = 24 centimeters per second. Use a = 0.10. Construct a 90% confidence interval on the difference in means.

The burning rates of two different solid-fuel propellants used in air crew escape systems are being studied. It is known that both propellants have approximately the same standard deviatio of burning rate; that is o, = 02 = 3 centimeters per second. Two random samples of n = 20 and n2 = 20 specimens are tested; the sample mean burning rates are = 18 centimeters per second and x, = 24 centimeters per second. Use a = 0.10. Construct a 90% confidence interval on the difference in means.

MATLAB: An Introduction with Applications
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 1 The burning rates of two different solid-fuel propellants used in air crew escape systems are being studied. It is known that both propellants have approximately the same standard deviation of burning rate; that is o, = 0, = 3 centimeters per second. Two random samples of n = 20 and n2 = 20 specimens are tested; the sample mean burning rates are x = 18 centimeters per second and x, = 24 centimeters per second. Use a = 0.10. Construct a 90% confidence interval on the difference in means. a. None among the choices O b. Cl on the mean: -7.86 <= u1 - u2 <= -4.14 O. Cl on the mean: -7.57 <= u1 - u2 <= -4.43 O d. Cl on the mean: -8.45 <= u1 - u2 <= -3.55
Transcribed Image Text:Question 1 The burning rates of two different solid-fuel propellants used in air crew escape systems are being studied. It is known that both propellants have approximately the same standard deviation of burning rate; that is o, = 0, = 3 centimeters per second. Two random samples of n = 20 and n2 = 20 specimens are tested; the sample mean burning rates are x = 18 centimeters per second and x, = 24 centimeters per second. Use a = 0.10. Construct a 90% confidence interval on the difference in means. a. None among the choices O b. Cl on the mean: -7.86 <= u1 - u2 <= -4.14 O. Cl on the mean: -7.57 <= u1 - u2 <= -4.43 O d. Cl on the mean: -8.45 <= u1 - u2 <= -3.55
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