The burning rates | Mathematics homework help

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 = σ 2 = 3 centimeters per second. Two random samples of n1 = 20 and n2 = 20 specimens are tested; the sample mean burning rates are width= = 18 centimeters per second and width= = 24 centimeters per second.

(a) Test the hypothesis that both propellants have the same mean burning rate. Use α = 0.05.

(b) What is the P-value of the test in part (a)?

(c) What is the β-error of the test in part (a) if the true difference in mean burning rate is 2.5 centimeters per second?

(d) Construct a 95% confidence interval on the difference in means μ1 – μ2. What is the practical meaning of this interval?

Need your ASSIGNMENT done? Use our paper writing service to score better and meet your deadline.

Click Here to Make an Order Click Here to Hire a Writer