Can you please help answer :

One group of accounting students took a distance learning class, while another group took the same course in a traditional classroom. At a = .10, is there a signicant difference in the mean scores listed below":I Exall Scores for Accounting Students Statistic Distance Classroom Mean scores 31: 9.4 m: 18.8 Sample std. dev. 51: 2.3 52: 2.? Number of students \"1: 21 "2: 21 {b} Specify the decision rule. (Round your answers to 3 decimal places. A negative value should be indicated by a minus sign.} Reject the null hypothesis if Ital: