Draw a frequency polygon for the following data:
| Class intervals | 40-50 | 50-60 | 60-70 | 70-80 | 80-90 | 90-100 |
| Frequency | 15 | 28 | 45 | 32 | 41 | 18 |
Solution:
In a class of 60 students, the marks obtained in a monthly test were as under:
| Marks | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 |
| Students | 10 | 25 | 12 | 08 | 05 |
Solution:
More Solutions:
- The class marks of a frequency distribution are given:
- A grouped frequency distribution table with class intervals:
- If the mean of x1, x, is 7.5, and the mean of x1, X2, x3 is;
- The mean of 100 observations is 50.
- For drawing a frequency polygon of a continuous frequency distribution.
- The mean and the median of the following set of numbers:
- Find the mean and the median of all the (positive) factors of 48.
- Find the mean weight of the remaining students.
- What is the new mean age?