Test for a difference in average expenses between the Support department and Accounting department using a $5\%$ significance level. Do not assume that the population variances are equal. Note: You will need to use filters to create separate columns for Support expenses and Accounting expenses similar to what is done in the Excel lecture video.

Using the information in your Excel output, calculate the Lower Bound of a $95\%$ confidence interval for the difference in average expenses between the Support department and Accounting department. Use the Support department as population $1.$ Round to $2$ decimals.

Your Answer: