The manager at In & Out Burger wishes to compare the sales per day at two locations. The mean number sold for 10 randomly selected days at the Uptown location was 83.55, and the standard deviation was 10.50. For a random sample of 12 days at the Downtown location, the mean number sold was 78.80 and the standard deviation was 14.25. At the .05 significance level, is there a difference in the mean number of hamburgers sold at the two locations?