In order to determine whether or not there is a significant difference between the hourly wages of two companies, the following data have been accumulated. Company A Company B
Sample size 48 64
Sample mean $16.75 $16.20
Population standard deviation $1.20 $0.80

To perform a test of hypothesis to see whether or not there is a significant difference between the hourly wages of companies A and B, the problem should be formulated as a one-tailed test (lower-tail). What is the 95% confidence interval estimate of the difference between the population means for the two populations?