The mean of the following distribution is 52. Determin the value of p.
7
4
13
6
Calculate the mean and the standard deviation for the following distribution.
Marks20−3030−4040−5050−6060−7070−8080−90Number of students3613151454
Calculate the mean for the following frequency distribution:
Marks
10 - 20
20 - 30
30 - 40
40 - 50
50 - 60
60 - 70
70 - 80
Frequency
3
10
8
2