Researchers at the corporate office of an airline wonder if there is a significant difference between the cost of a flight on Priceline.com vs. the airline's own website. A random sample of 24 flights were tracked on Priceline and the airline's website and the mean difference in price (Priceline - Airline Site) was $42.115 with a standard deviation of $14.695. If you wanted to create a 95% confidence interval for the true average difference in costs between the vendors, what is the margin of error?