For the following data independent samples, could the null hypothesis that the population means are equal be rejected at the 0.05 level?
Sample1 Sample2 Sample3 Sample4
15.2 10.2 14.9 11.5
12.2 12.1 13.0 13.1
15.0 8.5 10.8 11.5
14.6 8.1 10.7 6.3
9.7 10.9 13.3 12.0
13.6 10.6 8.7
8.5 11.9
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