Advertisements
Advertisements
प्रश्न
The weights of new born babies (in kg) in a hospital on a particular day are as follows:
2.3, 2.2, 2.1, 2.7, 2.6, 3.0, 2.5, 2.9, 2.8, 3.1, 2.5, 2.8, 2.7, 2.9, 2.4
(i) Rearrange the weights in descending order.
(ii) Determine the highest weight.
(iii) Determine the lowest weight.
(iv) Determine the range.
(v) How many babies were born on that day?
(vi) How many babies weigh below 2.5 kg?
(vii) How many babies weigh more than 2.8 kg?
(viii) How many babies weigh 2.8 kg?
उत्तर
The frequency distribution of the weights of new born babies in a hospital on a particular day is represented in the following table:
(i) The weights of the newly born babies in descending order are as follows:
| Weight | Tally marks | Frequency |
| 3.1 | I | 1 |
| 3.0 | I | 1 |
| 2.9 | II | 2 |
| 2.8 | II | 2 |
| 2.7 | II | 2 |
| 2.6 | I | 1 |
| 2.5 | II | 2 |
| 2.4 | I | 1 |
| 2.3 | I | 1 |
| 2.2 | I | 1 |
| 2.1 | I | 1 |
(ii) The highest weight is 3.1 kg.
(iii) The lowest weight is 2.1 kg.
(iv) The range is 3.1\[-\]2.1, i.e. 1 kg.
(v) The number of babies born on that day is 15.
(vi) The number of babies whose weights are below 2.5 kg is 4 (i.e. 2.4, 2.3, 2.2, 2.1).
(vii) The number of babies whose weights are more than 2.8 kg is 4 (i.e. 3.1, 3.0, 2.9, 2.9).
(viii) The number of babies whose weight is 2.8 kg is 2.
APPEARS IN
संबंधित प्रश्न
Define the following term:
Observations
Define the following term:
Class-size
The marks scored by 20 students in a test are given below:
54, 42, 68, 56, 62, 71, 78, 51, 72, 53, 44, 58, 47, 64, 41, 57, 89, 53, 84, 57.
Complete the following frequency table:
| (Marks in class intervals) | Tally marks | Frequency (no. of children) |
| 40 - 50 | ||
| 50 - 60 | ||
| 60 - 70 | ||
| 70 - 80 | ||
| 80 - 90 |
What is the class interval in which the greatest frequency occurs?
Construct a frequency table for the following weights (in gm) of 35 mangoes using the equal class intervals, one of them is 40-50 (45 not included):
30, 40, 45, 32, 43, 50, 55, 62, 70, 70, 61, 62, 53, 52, 50, 42, 35, 37, 53, 55, 65, 70, 73, 74, 45, 46, 58, 59, 60, 62, 74, 34, 35, 70, 68.
(i) What is the class mark of the class interval 40-45?
(ii) What is the range of the above weights?
(iii) How many classes are there?
Yamini did a project ‘Animals and Birds’. She asked each child in her class about one favorite pet animal.
She used tally marks to record each answer. For example, if someone said ‘cat’ she means 5 cats. In all 24 children said ‘cat’ was their favorite animal. Help Yamini complete the table.
| Animal | Tally marks | Number |
| Cats |  |
24 |
| Dogs |  |
|
| Rabbits |  |
|
| Cows |  |
|
| Parrots |  |
|
| Goats |  |
|
| Squirrel |  |
- Look at the tally marks and write the number for each animal on the table. How many children in all did Yamini talk to?
- Which is the most favorite pet animal on this table?
- Which pet will you like to have? What will you name it? Which other animals can be kept at home? Discuss.
When the number of observations is large, the observations are usually organised in groups of equal width called ______.
Using tally marks, which one of the following represents the number eight:
The marks (out of 10) obtained by 28 students in a Mathematics test are listed as below:
8, 1, 2, 6, 5, 5, 5, 0, 1, 9, 7, 8, 0, 5, 8, 3, 0, 8, 10, 10, 3, 4, 8, 7, 8, 9, 2, 0
The number of students who obtained marks more than or equal to 5 is ______.
According to data of question 4, which fruit is liked by most of the students?
Following is the choice of sweets for 30 students of Class VI.
| Ladoo, Barfi, Ladoo, Jalebi, Ladoo, Rasgulla, Jalebi, Ladoo, Barfi, Rasgulla, Ladoo, Jalebi, Jalebi, Rasgulla, Ladoo, Rasgulla, Jalebi, Ladoo, Rasgulla, Ladoo, Ladoo, Barfi, Rasgulla, Rasgulla, Jalebi, Rasgulla, Ladoo, Rasgulla, Jalebi, Ladoo. |
Arrange the names of sweets in a table using tally marks.
