A rocket motor is manufactured by bonding together two types of propellants, an igniter and a sustainer. The shear strength of thebond 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 thefollowing table.Obs. No. Strength (psi) y Age (weeks) xObs. No. Strength (psi) y Age (weeks) x12170.9014.25112183.4014.2521,678.1523.75122,399.553.7532,316.008.00131,779.8025.0042,061.3017.00142,336.759.7552,207.505.00151,765.3022.061,708.3019.00162,053.5018.0071,784.7024.00172,414.406.0082,575.002.50182,200.5012.509.2,357.907.50192,654.202.00102,277.7011.001,753.7021.5020 Fit a linear regression model.(a) Test for significance of regression with a =0.01.fo(Round your answer to 2 decimal places.)Is the model significant?(b) Estimate the standard errors of the intercept and slope.se( ß o)i(Round your answer to 3 decimal places.)se( B 1) =(Round your answer to 3 decimal places.)i(c) Test the hypothesis Ho: B1- 30 versus H1: Bi # – 30 using a = 0.10.to = i(Round your answer to 3 decimal places.)Is the slope equal to -30?(d) Test the hypothesis Ho: Bo = 0 versus H1: Bo 7 0 using a = 0.01.to(Round your answer to 3 decimal places.)Is the intercept significant in the model?(e) Test the hypothesis Ho: Bo2500 versus H1: Bo > 2500 using a =-0.025.to=(Round your answer to 3 decimal places.)Is the intercept significantly greater than 2500?

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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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ew urrent Attempt in Progress A manager wishes to predict the annual cost (y) of an automobile based on the nur was developed: y = 1,550 +0.36x. If a car is driven 30,000 kilometres, the predicte O 12,350 O 2,630 O 10,800 O 10,250 0 9,250
In a regression analysis involving 30 observations, the following estimated regression equation was obtained. ŷ = 18.6 + 3.7x, - 2.2x2 + 7.9x3 + 2.6x4 (a) Interpret b, in this estimated regression equation. = 3.7 is an estimate of the change in y corresponding to a 1 unit change in x, when x,, x3, and x, are held constant. = -2.2 is an estimate of the change in y corresponding to a 1 unit change in x, when x2, x3, and x are held constant. O b1 = 7.9 is an estimate of the change in y corresponding to a1 unit change in x, when x,, x2, and x, are held constant. O b, O b, = 3.7 is an estimate of the change in y corresponding to a 1 unit change in x, = 2.6 is an estimate of the change in y corresponding to a 1 unit change in x, when x,, x2, and x3 are held constant. when and x4 are held constant. Interpret b, in this estimated regression equation. O b2 = 2.6 is an estimate of the change in y corresponding to a 1 unit change in x, when x,, x2, and x, are held constant. = 7.9 is an estimate…
Can balloons hold more air or more water before bursting? A student purchased a large bag of 12-inch balloons. He randomly selected 10 balloons from the bag and then randomly assigned half of them to be filled with air until bursting and the other half to be filled with water until bursting. He used devices to measure the amount of air and water was dispensed until the balloons burst. Here are the data
. At wind speeds above 1000 cm/sec, significant sand–moving events begin to occur. Wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. The cyclic nature of wind and moving sand determines the shape and location of large dunes. At a test site, the prevailing direction of the wind did not change noticeably. However, the velocity did change. 75 wind speed readings gave an average velocity of x =1045 cm/sec. Based on long–term experience,  can be assumed to be 240 cm/sec Find a 99% confidence interval for the population mean wind speed at this site. (Round your answers to the nearest whole number) (DO A MANUAL CALCULATION, SHOWING ALL WORK INCLUDING THE EQUATION USED AND THEN WITH ALL VALUES PLUGGED INTO THE EQUATION)(SHOW WORK ABOVE) [final answer] Margin of Error: E = (value with units)[final answer] Confidence Interval : _________________ < __________________ < __________________ (value with units) (correct symbol) (value with…
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