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In fatigue studies a parabola of the Gerber typesaSe smSut 2 1is useful see Sec 612 Solved for sa the preceding equation becomessa Se SeS2uts2mThis implies a regression model of the form

In fatigue studies a parabola of the Gerber typesaSe+ smSut 2= 1is useful (see Sec. 6–12). Solved for sa the preceding equation becomessa = Se - SeS2uts2mThis implies a regression model of the form y = a0 + a2x2 . Show that the normal equations arey = na0 + a2x2xy = a0x + a2x3and thata0 =x3y -x2xynx3 -xx2 and a2 = nxy -xynx3 -xx2Plot the datax 20 40 60 80y 19 17 13 7superposed on a plot of the regression line
 

Jun 24 2020 View more View Less

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