Mathematics
In a malaria epidemic, the number of cases diagnosed were as follows :
| Date (July) | Number |
|---|---|
| 1 | 5 |
| 2 | 12 |
| 3 | 20 |
| 4 | 27 |
| 5 | 46 |
| 6 | 30 |
| 7 | 31 |
| 8 | 18 |
| 9 | 11 |
| 10 | 5 |
| 11 | 0 |
| 12 | 1 |
On what days do the mode, the upper and the lower quartiles occur ?
Related Questions
The inter quartile range for the given ogive is :
42
32
44
54
The mean of 1, 7, 5, 3, 4 and 4 is m. The numbers 3, 2, 4, 2, 3, 3 and p have mean m - 1 and median q. Find p and q.
Using a graph paper, draw an ogive for the following distribution which shows a record of the weight in kilograms of 200 students.
Weight Frequency 40 - 45 5 45 - 50 17 50 - 55 22 55 - 60 45 60 - 65 51 65 - 70 31 70 - 75 20 75 - 80 9 Use your ogive to estimate the following :
(i) The percentage of students weighing 55 kg or more.
(ii) The weight above which the heaviest 30% of the students fall,
(iii) The number of students who are (a) under-weight and (b) over weight, if 55.70 kg is considered as standard weight ?
The marks obtained by 120 students in a Mathematics test are given below :
Marks No. of students 0 - 10 5 10 - 20 9 20 - 30 16 30 - 40 22 40 - 50 26 50 - 60 18 60 - 70 11 70 - 80 6 80 - 90 4 90 - 100 3 Draw an ogive for the given distribution on a graph sheet. Use a suitable scale for your ogive. Use your ogive to estimate :
(i) the median
(ii) the number of students who obtained more than 75% marks in a test ?
(iii) the number of students who did not pass in the test if the pass percentage was 40?
(iv) the lower quartile.