Find 90% confidence intervals for β0 and β1. (f) A chemical engineer claims that the percentage of exposed cells without aberra- tions decreased by more than 15 for 1 degree increase of exposure to 242Cm alpha radiation particles. Do the data provide sufficient evidence for you to conclude that this claim is correct? (g) Find a 90% confidence interval for the mean percentage of exposed cells without aberrations at a exposure degree of 2.5. (h) Find a 90% prediction interval for the percentage of exposed cells without aber- rations of a particular exposure at degree of 2.5.