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An experiment is conducted to see whether the brand of light-green interior latex paint has an effect on the amount of coverage (number of meter covered). The data on the amount of coverage (number of meter covered) presented as follow. Brand A Brand B Brand C Brand D 20 24 30 15 21 16 19 12 22 26 25 21 13 27 24 20 15 28 22 18 SPSS output provided is as follow. ANOVA Meter Sum of Squares df Mean Square F Sig. Between Groups P 3 69.133 4.002 .027 Within Groups 276.400 16 R Total 483.800 a) Calculate the value of P. Hence, find Q and R values. (3 marks) b) At the 5% significance level, is there any difference on the mean amount of coverage (number of meter covered) among the four paint brands