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What is the lower bound of the two-sided confidence interval

What is the lower bound of the two-sided confidence interval

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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     What is the lower bound of the two-sided confidence interval?

The burning rates of two different solid-fuel propellants used in aircrew escape systems are being studied. It is known that both propellants have approximately the same standard deviation of burning rate; that is, a₁ = ₂ = 3 cm/s. From a random sample of size n₁ = 20 and n₂ = 20, we obtain₁ = 18.02 cm/s and ₂2 = 24.31 cm/s. Construct a 95% confidence interval on the difference in means μ₁ - ₂. Round your answers to 3 decimal places (e.g. 98.765).
Transcribed Image Text:The burning rates of two different solid-fuel propellants used in aircrew escape systems are being studied. It is known that both propellants have approximately the same standard deviation of burning rate; that is, a₁ = ₂ = 3 cm/s. From a random sample of size n₁ = 20 and n₂ = 20, we obtain₁ = 18.02 cm/s and ₂2 = 24.31 cm/s. Construct a 95% confidence interval on the difference in means μ₁ - ₂. Round your answers to 3 decimal places (e.g. 98.765).
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