Actual test output:

>t-test (c1,c1mm) Welch Two Sample t-test

data: c1 and c1mm

t = −0.3481, df = 923.999, p-value = 0.7278

Alternative hypothesis: true difference in means is not equal to 0

−3.225762 2.253839 :95 percent confidence interval

Sample estimates: mean of x 34.27646 mean of y 34.76242