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प्रश्न
Describe some fundamental characteristics of statistics.
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उत्तर
Fundamental characteristics of statistics:
1. A single observation does not form statistics are a sum total of observation
2. Statics are expressed quantitatively not qualitatively
3. Statistics are collected with definite purpose
4. Statistics in an experiment are comparable and can be classified various groups.
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संबंधित प्रश्न
Explain the meaning of the term Class-size.
Explain the meaning of the term Frequency.
Explain the difference between a frequency distribution and a cumulative frequency distribution.
The following table gives the daily income of 50 workers of a factory:
| Daily income (in Rs) | 100 – 120 | 120 – 140 | 140 – 160 | 160 – 180 | 180 – 200 |
| No. of workers | 12 | 14 | 8 | 6 | 10 |
Find the mean, median and mode of the above data.
The table below shows the daily expenditure on food of 30 households in a locality:
| Daily expenditure (in Rs) | Number of households |
| 100 – 150 | 6 |
| 150 – 200 | 7 |
| 200 – 250 | 12 |
| 250 – 300 | 3 |
| 300 – 350 | 2 |
Find the mean and median daily expenditure on food.
For a certain distribution, mode and median were found to be 1000 and 1250 respectively. Find mean for this distribution using an empirical relation.
In a frequency distribution table with 12 classes, the class-width is 2.5 and the lowest class boundary is 8.1, then what is the upper class boundary of the highest class?
Find the class marks of classes 10−25 and 35−55.
As the number of tosses of a coin increases, the ratio of the number of heads to the total number of tosses will be `1/2`. Is it correct? If not, write the correct one.
The monthly pocket money of ten friends is given below :
₹ 80, ₹ 65, ₹ 35, ₹ 65, ₹ 50, ₹ 30, ₹ 60, ₹ 35, ₹ 65, ₹ 30
What is the highest pocket money?
