A random sample of 28 statistics tutorials was selected from thepast 5 years and the percentage of students absent from each onerecorded. The results are given below. Assume the percentages ofstudents' absences are approximately normally distributed. UseExcel to estimate the mean percentage of absences per tutorial overthe past 5 years with 90% confidence. Round your answers to twodecimal places and use increasing order.
Number of Absences
13.9
16.4
12.3
13.2
8.4
4.4
10.3
8.8
4.8
10.9
15.9
9.7
4.5
11.5
5.7
10.8
9.7
8.2
10.3
12.2
10.6
16.2
15.2
1.7
11.7
11.9
10.0
12.4
