Mathematics
Use graph paper to answer this question:
During a medical checkup of 60 students in a school, weights were recorded as follows:
| Weight (in kg) | Number of students |
|---|---|
| 28 - 30 | 2 |
| 30 - 32 | 4 |
| 32 - 34 | 10 |
| 34 - 36 | 13 |
| 36 - 38 | 15 |
| 38 - 40 | 9 |
| 40 - 42 | 5 |
| 42 - 44 | 2 |
Taking 2 cm = 2 kg along one axis and 2 cm = 10 students along the other axis, draw an ogive. Use your graph to find the:
(i) Median
(ii) Upper quartile
(iii) Number of students whose weight is above 37 kg
Related Questions
A survey regarding height (in cm) of 60 boys belonging to class 10 of a school was conducted. The following data was recorded:
Height (in cm) Number of boys 135 - 140 4 140 - 145 8 145 - 150 20 150 - 155 14 155 - 160 7 160 - 165 6 165 - 170 1 Taking 2 cm = height of 10 cm along one axis and 2 cm = 10 boys along the other axis, draw an ogive of the above distribution. Use the graph to estimate the following :
(i) the median
(ii) the lower quartile
(iii) if above 158 cm is considered as the tall boys of the class, find the number of boys in the class who are tall.
Calculate the mean, median and mode of the following numbers:
(i) 17, 19, 11, 23, 19
(ii) 7, 9, 8, 11, 8, 12, 8, 9
(iii) 2, 1, 0, 3, 1, 2, 3, 4, 3, 5
(iv) 8, 10, 7, 6, 10, 11, 6, 13, 10
The marks of 10 students of a class in an examination arranged in ascending order is as follows:
13, 35, 43, 46, x, x + 4, 55, 61, 71, 80
If the median marks is 48, find the value of x. Hence, find the mode of the given data.