10. At the .025 significance level, test the claim that the four brands have the same mean if the following sample results have been obtained. BrandA | BrandB | BrandC | BrandD 15 20 21 15 25 17 22 15 21 22 20 14 23 23 19 23 22 18 22 20 28 28 claim null hypothesis... alternative hypothesis. Calculator Screen Name... test statistic . . . . . . . . ...... P = 0. 9822 > 2= 0.025 pvalue/alpha comparison.. . .. .. decision . . . . . . . Conclusion