t.test (mut, notmut, alternative "two.sided", var.equal = FALSE) Welch Two Sample t-test data: mut and notmut t = -1.2402, df = 221.74, p-value = 0.2162 alternative hypothesis: true difference in means is not equal to o 95 percent confidence interval: -4.661749 1.060564 sample estimates: mean of x mean of y 58.46789 60.26848

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