A Statistics Teacher Wants to See If There Is Any

Multiple Choice

A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the following information. ​ The 98% confidence interval for the difference between the two population means is

A) -9.92 to -2.08.
B) -10.66 to -1.34.
C) -13.84 to -1.16.
D) -24.77 to 12.23.