Arocket Motor Is Manufactured By Bonding Together Two Types Of Propellants An Igniter And A Sustainer The Shear Streng 1 (55.42 KiB) Viewed 17 times
Arocket motor is manufactured by bonding together two types of propellants, an igniter and a sustainer. The shear strength of the bond y is thought to be a linear function of the age of the propellant x when the motor is cast. Twenty observations are shown in the following table. Obs. No. Strength (psi) y Age (weeks) Obs. No. Strength (psi) y Age (weeks) X 1 2142.50 14.75 11 2180.60 11.00 2 1,678.15 23.75 12 2,399.55 3.75 3 2,316.00 8.00 13 1,779.80 25.00 4 2,061.30 17.00 14 2,336.75 9.75 ол 5 2,207.50 5.00 15 1,765.30 22.0 6 1,708.30 19.00 16 2,053.50 18.00 7 1.784.70 24.00 17 2,414.40 6.00 8 2,575.00 2.50 18 2,200.50 12.50 9 2,357.90 7.50 19 2,654.20 2.00 10 2,277.70 11.00 20 1,753.70 21.50 Fit a linear regression model. (a) Test for significance of regression with a = 0.01. fo= i (Round your answer to 2 decimal places.) Is the model significant?
(b) Estimate the standard errors of the intercept and slope. selßo) i (Round your answer to 3 decimal places.) seſßi) = i (Round your answer to 3 decimal places.) (c) Test the hypothesis Ho: Bi = - 30 versus H :B + - 30 using a = 0.10. to = i (Round your answer to 3 decimal places.) Is the slope equal to -30? V (d) Test the hypothesis Ho: Bo = Oversus H: Bo # 0 using a = 0.01. to = i (Round your answer to 3 decimal places.) Is the intercept significant in the model? (e) Test the hypothesis Ho: Bo = 2500 versus H1: Bo > 2500 using a = 0.025. to = i (Round your answer to 3 decimal places.) Is the intercept significantly greater than 2500?
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