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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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Please help correct part C) thanks
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 = 0₂ = 3 cm/s. From a random sample of size n₁ = 20 and n₂ = 20, we obtain x₁ = 18.02 cm/s and X₂ = 24.39 cm/s. Good. Since the value of the test statistic falls in the rejection region, we reject Ho Ho at a = 0.05.a = 0.05. (a) Test the hypothesis that both propellants have the same mean burning rate. Use a fixed-level test with α = 0.05 and choose the appropriate conclusion from below: Since -6.71 < -1.96 eTextbook and Media we reject P = 0.000 Good. The probability of obtaining a test statistic as extreme as the observed test statistic is approximately 0. (b) What is the P-value of the test in part (a)? Round your answer to 3 decimal places (e.g. 98.765). eTextbook and Media X Incorrect. Try again. ✓the null hypothesis. (c) What is the B-error of the test in part (a) if the true difference in mean burning rate is 2.5 cm/s? B-i 0.24984 Round your answer to 5 decimal places (e.g. 98.76543). eTextbook and Media Statistical Tables and Charts Good. We are 95% confident that the difference in mean burning rates between propellant 1 and propellant 2 is between -8.229 and -4.511 cm/s. (d) Construct a 95% confidence interval on the difference in means μ₁-M₂. Round your answers to 3 decimal places (e.g. 98.765). Interval: [ -8.229 eTextbook and Media -4.511
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 = 0₂ = 3 cm/s. From a random sample of size n₁ = 20 and n₂ = 20, we obtain x₁ = 18.02 cm/s and X₂ = 24.39 cm/s. Good. Since the value of the test statistic falls in the rejection region, we reject Ho Ho at a = 0.05.a = 0.05. (a) Test the hypothesis that both propellants have the same mean burning rate. Use a fixed-level test with α = 0.05 and choose the appropriate conclusion from below: Since -6.71 < -1.96 eTextbook and Media we reject P = 0.000 Good. The probability of obtaining a test statistic as extreme as the observed test statistic is approximately 0. (b) What is the P-value of the test in part (a)? Round your answer to 3 decimal places (e.g. 98.765). eTextbook and Media X Incorrect. Try again. ✓the null hypothesis. (c) What is the B-error of the test in part (a) if the true difference in mean burning rate is 2.5 cm/s? B-i 0.24984 Round your answer to 5 decimal places (e.g. 98.76543). eTextbook and Media Statistical Tables and Charts Good. We are 95% confident that the difference in mean burning rates between propellant 1 and propellant 2 is between -8.229 and -4.511 cm/s. (d) Construct a 95% confidence interval on the difference in means μ₁-M₂. Round your answers to 3 decimal places (e.g. 98.765). Interval: [ -8.229 eTextbook and Media -4.511
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