Need help with problem D

Homework: 7-2 MyStatLab: Module Seven Problem Set Save Score: 2.16 of 8 pts 6 of 10 (9 complete) HW Score: 51.46%, 33.45 of 65 pt X 14.1.15-T Question Help As concrete cures, it gains strength. The following data represent the 7-day and 28-day strength in pounds per square inch (psi) of a certain type of concrete. Complete parts (a) through (f) below. 7-Day Strength (psi), x 2480 2890 2300 3330 3380 28-Day Strength (psi), y 4120 4620 4070 4850 5020 (a) Treating the 7-day strength as the explanatory variable, x, use technology to determine the estimates of Bo and By . Po bo = 2048.2 (Round to one decimal place as needed.) By ~ by = 0.8650 (Round to four decimal places as needed.) (b) Compute the standard error of the estimate, Se. Se = 81.9 (Round to one decimal place as needed.) (c) A normal probability plot suggests that the residuals are normally distributed. Determine sp . Use the answer from part (b). Sb, = 0.0840 (Round to four decimal places as needed.) (d) A normal probability plot suggests that the residuals are normally distributed. Test whether a linear relation exists between 7-day strength and 28-day strength at the a = 0.05 level of significance. State the null and alternative hypotheses. Choose the correct answer below. O A. Ho: Po = 0 H1: Po = 0 OB. Ho: Po = 0 H1: Bo > 0 O C. Ho: By = 0 H1: B1 0 OD. HO: B1 = 0