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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
What do you understand by the word “statistics” in
(i) Singular form
(ii) Plural form?
Find the mean, median and mode of the following data:
| Class | 0 – 10 | 10 – 20 | 20 – 30 | 30 – 40 | 40 – 50 | 50 – 60 | 60 – 70 |
| Frequency | 4 | 4 | 7 | 10 | 12 | 8 | 5 |
Find the mean, median and mode of the following data.
| Class | 0 – 20 | 20 – 40 | 40 – 60 | 60 – 80 | 80 – 100 | 100 – 120 | 120 – 140 |
| Frequency | 6 | 8 | 10 | 12 | 6 | 5 | 3 |
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?
The median of 19 observations is 30. Two more observations are made and the values of these are 8 and 32. Find the median of the 21 observations taken together.
| HINT | Since 8 is less than 30 and 32 is more than 30, so the value of median (middle value) remains unchanged. |
Find the class marks of classes 10−25 and 35−55.
Define primary data and secondary data.
Explain the meaning of the following terms: True Class Limits
The times, in seconds, taken by 150 athletes to run a 110 m hurdle race are tabulated below:
| Class | 13.8 – 14 | 14 – 14.2 | 14.2 – 14.4 | 14.4 – 14.6 | 14.6 – 14.8 | 14.8 – 15.0 |
| Frequency | 2 | 4 | 5 | 71 | 48 | 20 |
The number of athletes who completed the race in less than 14.6 seconds is:
The Empirical relation between the three measures of central tendency is ______.
