The Burning Rates Of Two Different Solid Fuel Propellants Used In Aircrew Escape Systems Are Being Studied It Is Known 1 (55.7 KiB) Viewed 44 times
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, σ1=σ2=3 cm/s. From a random sample of size n1=20 and n2=20, we obtain xˉ1=18.02 cm/s and xˉ2=24.36 cm/s.
(b) What is the P-value of the test in part (a)? Round your answer to 3 decimal places (e.g. 98.765). P= (c) What is the β-error of the test in part (a) if the true difference in mean burning rate is 2.5 cm/s ? Round your answer to 5 decimal places (e.g. 98.76543).
Incorrect. Try again. Recall that a 100(1−α)% confidence interval for μ1−μ2 is given by xˉ1−xˉ2−zα/2n1σ12+n2σ22≤μ1−μ2≤xˉ1−xˉ2+zα/2n1σ12+n2σ22 where xˉ1 and xˉ2 are the means of independent samples of sizes n1 and n2 from populations with known variances σ12 and σ22. (d) Construct a 95\% confidence interval on the difference in means μ1−μ2. Round your answers to 3 decimal places (e.g. 98.765).
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!