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प्रश्न
The marks in a subject for 12 students are as follows:
31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29
For the given data, find the median
उत्तर
Given data is 31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29.
Rearranging the given data in ascending order,
17, 18, 23, 25, 29, 31, 35, 35, 35, 37, 38, 42
Here, n = 12 .....(Even)
Median = `("Value of" (n/2)"th observation" + "Value of" (n/2 + 1)"th observation")/2`
= `("Value of" 6"th observation" + "Value of" 7"th observation")/2`
= `(31 + 35)/2`
= `66/2`
= 33
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संबंधित प्रश्न
The following table gives the heights of plants in centimeter. If the mean height of plants is 60.95 cm; find the value of 'f'.
| Height (cm) | 50 | 55 | 58 | 60 | 65 | 70 | 71 |
| No. of plants | 2 | 4 | 10 | f | 5 | 4 | 3 |
From the following cumulative frequency table, draw ogive and then use it to find:
- Median
- Lower quartile
- Upper quartile
| Marks (less than) | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| Cumulative frequency | 5 | 24 | 37 | 40 | 42 | 48 | 70 | 77 | 79 | 80 |
The marks of 20 students in a test were as follows:
2, 6, 8, 9, 10, 11, 11, 12, 13, 13, 14, 14, 15, 15, 15, 16, 16, 18, 19 and 20.
Calculate:
- the mean
- the median
- the mode
Find the mean of first 10 prime numbers.
Find the mode of the following:
15, 17, 16, 17, 10, 12, 14, 16, 19, 12, 16, 15, 16
Find the median of the following frequency distribution :
| Weight(kg) | 36 | 38 | 40 | 42 | 44 |
| No. of students | 11 | 26 | 29 | 24 | 10 |
Find the mean of: all prime numbers upto 30
Find the mean of 35, 44, 31, 57, 38, 29, 26,36, 41 and 43.
Find the median of the given data: 35, 25, 34, 36, 45, 18, 28
If the extreme observations on both the ends of a data arranged in ascending order are removed, the median gets affected.
