Question 4 (20 points) In testing the effectiveness of 4 brands of Melatonin (a sleep aid), we collected the following sleep time data Brand A 6.2 6.1 6.0 6.3 6.1 5.9 Brand B 6.3 6.5 6.7 6.6 7.1 6.4 Brand C 6.8 7.1 6.6 6.8 6.9 6.6 Brand D 5.4 6.4 6.2 6.3 6.0 5.9 At significance level o = 0.05, complete the following table: Source Degree of freedom Sum of squares Mean squares F-statistic p-value Between ? ? Within Total For the p-value, you may use the CDF of the F distribution without calculating its value