3 (8 marks) An experiment is conducted to see whether the light-green interior latex paint influences the amount of coverage. The data on the amount of coverage is presented as follow. Brand A Brand B Brand C Brand D 20 24 30 15 19 15 17 12 22 26 25 21 13 27 24 20 15 28 22 18 ANOVA Sum of Mean F Sig. Squares Square Between groups P 66.583 R .042 Within groups Total 308.800 16 19.300 508.550 19 a) Calculate the value of P using the SSB formula b) Find Q and R values c) Assume the amount of coverage is normally distributed. At a 5% level of significance, is there any difference in the mean amount of coverage among the four paint brands