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प्रश्न
Prepare a frequency table of the following ages (in years) of 30 students of class VIII in your school:
13, 14, 13, 12, 14, 13, 14, 15, 13, 14, 13, 14, 16, 12, 14, 13, 14, 15, 16, 13, 14, 13, 12, 17, 13, 12, 13, 13, 13, 14
उत्तर
The frequency table of the ages of 30 students of class VII in the school is given below:
| Age | Tally Marks | Frequency |
| 12 | |||| | 4 |
| 13 | 12 | |
| 14 | 9 | |
| 15 | || | 2 |
| 16 | || | 2 |
| 17 | | | 1 |
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संबंधित प्रश्न
Define the following term:
Class-interval
Prepare a frequency table of the following scores obtained by 50 students in a test:
| 42, | 51, | 21, | 42, | 37, | 37, | 42, | 49, | 38, | 52, | 7, | 33, | 17, |
| 44, | 39, | 7, | 14, | 27, | 39, | 42, | 42, | 62, | 37, | 39, | 67, | 51, |
| 53, | 53, | 59, | 41, | 29, | 38, | 27, | 31, | 64, | 19, | 53, | 51, | 22, |
| 61, | 42, | 39, | 59, | 47, | 33, | 34, | 16, | 37, | 57, | 43, |
The heights (in cm) of 30 students of class VIII are given below:
155, 158, 154, 158, 160, 148, 149, 150, 153, 159, 161, 148, 157, 153, 157, 162, 159, 151, 154, 156, 152, 156, 160, 152, 147, 155, 163, 155, 157, 153.
Prepare a frequency distribution table with 160-164 as one of the class intervals.
The table shows the number of calls recorded by a Fire Service Station in one year.
| Types of Calls | Tally Marks | Frequency |
| Building Fires | |||| | | |
| Other Fires | |||| |||| | | |
| Hazardous Materials | 7 | |
| Rescues | 4 | |
| False Alarms | |||| || | |
| Total | ||
Complete the table and answer the following questions.
(i) Which type of call was recorded the most?
(ii) Which type of call was recorded the least?
(iii) How many calls were recorded in all?
(iv) How many calls were recorded as False Alarms?
The prediction of Weather in the month of September is given below.
(i) Make a frequency table of the types of weather by reading the calendar.
(ii) How many days are either cloudy or partly cloudy?
(iii) How many days do not have rain? Give two ways to find the answer?
(iv) Find the ratio of the number of Sunny days to Rainy days
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.
An observation occurring five times in a data is recorded as | | | | |, using tally marks.
The number of two wheelers owned individually by each of 50 families are listed below. Make a table using tally marks.
1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 0, 1, 1, 2, 3, 1, 2, 1, 1, 2, 1, 2, 3, 1, 0, 2, 1, 0, 2, 1, 2, 1, 2, 1, 1, 4, 1, 3, 1, 1, 2, 1, 1, 1, 1, 2, 3, 2, 1, 1
Find the number of families having two or more, two wheelers.
Catherine threw a dice 40 times and noted the number appearing each time as shown below:
| 1 | 3 | 5 | 6 | 6 | 3 | 5 | 4 | 1 | 6 |
| 2 | 5 | 3 | 4 | 6 | 1 | 5 | 5 | 6 | 1 |
| 1 | 2 | 2 | 3 | 5 | 2 | 4 | 5 | 5 | 6 |
| 5 | 1 | 6 | 2 | 3 | 5 | 2 | 4 | 1 | 5 |
Make a table and enter the data using tally marks. Find the number that appeared.
The maximum number of times
Catherine threw a dice 40 times and noted the number appearing each time as shown below:
| 1 | 3 | 5 | 6 | 6 | 3 | 5 | 4 | 1 | 6 |
| 2 | 5 | 3 | 4 | 6 | 1 | 5 | 5 | 6 | 1 |
| 1 | 2 | 2 | 3 | 5 | 2 | 4 | 5 | 5 | 6 |
| 5 | 1 | 6 | 2 | 3 | 5 | 2 | 4 | 1 | 5 |
Make a table and enter the data using tally marks. Find the number that appeared.
Find those numbers that appear an equal number of times.
