As concrete? cures, it gains strength. The following datarepresent the? 7-day and? 28-day strength in pounds per squareinch? (psi) of a certain type of concrete. Complete parts? (a)through? (f) below. ?7-Day Strength? (psi), x 2480 3330 2620 33803390 ?28-Day Strength? (psi), y 4120 4850 4190 5020 5220 ?(a)Treating the? 7-day strength as the explanatory? variable, x, usetechnology to determine the estimates of beta 0 and beta 1. beta0almost equalsb 0equals nothing ?(Round to one decimal place as?needed.) beta 1almost equalsb 1equals nothing ?(Round to fourdecimal places as? needed.) Estimate error? P value? Upper?Lower?
