Mathematics
Calculate the mean, the median and the mode of the following distribution :
| Age in years | No. of students |
|---|---|
| 12 | 2 |
| 13 | 3 |
| 14 | 5 |
| 15 | 6 |
| 16 | 4 |
| 17 | 3 |
| 18 | 2 |
Related Questions
If the median of 5, 9, 11, 3, 4, x, 8 is 6, find the value of x.
The marks scored by 16 students in a class test are :
3, 6, 8, 13, 15, 5, 21, 23, 17, 10, 9, 1, 20, 21, 18, 12.
Find :
(i) the median
(ii) lower quartile
(iii) upper quartile
(iv) inter quartile range.
The daily wages of 30 employees in an establishment are distributed as follows :
Daily wages (in ₹) No. of employees 0 - 10 1 10 - 20 8 20 - 30 10 30 - 40 5 40 - 50 4 50 - 60 2 Estimate the modal daily wages for this distribution by a graphical method.
Draw a cumulative frequency curve for the following data :
Marks obtained No. of students 0 - 10 8 10 - 20 10 20 - 30 22 30 - 40 40 40 - 50 20 Hence, determine :
(i) the median
(ii) the pass marks if 85% of the students pass.
(iii) the marks which 45% of the students exceed.