Welch Two Sample t-test

data:  sample1 and sample2 
t = -0.9174, df = 4285.304, p-value = 0.1795
alternative hypothesis: true difference in means is less than 0 
95 percent confidence interval:
        -Inf 0.002555312 
sample estimates:
 mean of x  mean of y 
0.01196503 0.01518638