Please interpret the output below. What type of test was used and why?

Please interpret the output below. What type of test was used and why?

Please interpret the output below. What type of test was used and why? Is there a significant difference between these two means?Yearly Energy Costs LEED- Certified Buildings(in thousands of $)Yearly Energy Costs non-LEED- Certified Buildings(in thousands of $)Mean18.2221.46Variance1548.271318.33Observations6055Hypothesized Mean Difference0df73t Stat-1.678P(T<=t) one-tail0.048t Critical one-tail1.667P(T<=t) two-tail0.096t Critical two-tail1.993