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Question 15 1 pts One-way ANOVA is performed on independent samples taken from three normally distributed populations with equal variances. The following summary statistics are calculated: n = 6 2 50 = 8=5.2 7 8 2 55 82 = 4.9 n36 23 51 = 83 = 5.4 The grand mean equals: O 53.0. O 52.0. 52.3. O 52.7. Question 16 1 pts For a multiple regression model, the following statistics are given: SST = 250, SSE = 50, k = 4, n = 20. The adjusted coefficient of determination is about: O 0.775. 0.840. 0.800. O 0.747