

Question

In a college, the number of absentees recorded over a period of 30 days was as shown in the frequency distribution table



Number of absentees
0-4
5-9
10-14
15-19
20-24


Number of Days
1
5
10
9
5



Calculate the : (a) Mean
(b) Standard deviation , correct to two decimal places.



In a college, the number of absentees recorded over a period of 30 days was as shown in the frequency distribution table



Number of absentees
0-4
5-9
10-14
15-19
20-24


Number of Days
1
5
10
9
5


