Mathematics
Calculate the mean of the following distribution :
| Class interval | Frequency |
|---|---|
| 0 - 10 | 8 |
| 10 - 20 | 5 |
| 20 - 30 | 12 |
| 30 - 40 | 35 |
| 40 - 50 | 24 |
| 50 - 60 | 16 |
Related Questions
If the mean of the following distribution is 7.5, find the missing frequency f :
Variate Frequency 5 20 6 17 7 f 8 10 9 8 10 6 11 7 12 6 Marks obtained by 40 students in a short assessment is given below, where a and b are two missing data :
Marks No. of students 5 6 6 a 7 16 8 13 9 b If the mean of the distribution is 7.2, find a and b.
Calculate the mean of the following distribution using step deviation method :
Marks Number of students 0 - 10 10 10 - 20 9 20 - 30 25 30 - 40 30 40 - 50 16 50 - 60 10 The data on the number of patients attending a hospital in a month is given below. Find the average (mean) number of patients attending the hospital in a month using the short cut method.
Take assumed mean as 45. Give your answer correct to 2 decimal places.
Number of patients Number of days 10 - 20 5 20 - 30 2 30 - 40 7 40 - 50 9 50 - 60 2 60 - 70 5