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प्रश्न
Explain the difference between a frequency distribution and a cumulative frequency distribution.
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उत्तर
Frequencies table or frequency distribution is a method to represent raw data in the form from which one can easily understand the information contained in a raw data , where as a table which plays the manner in which cumulative frequencies are distributed over various classes is called a cumulative frequency distribution.
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संबंधित प्रश्न
What do you understand by the word “statistics” in
(i) Singular form
(ii) Plural form?
Describe some fundamental characteristics of statistics.
Explain the meaning of the term Variable.
A survey regarding the heights (in cm) of 50 girls of a class was conducted and the following data was obtained:
| Height (in cm) | 120 – 130 | 130 – 140 | 140 – 150 | 150 – 160 | 160 – 170 | Total |
| No. of girls | 2 | 8 | 12 | 20 | 8 | 50 |
Find the mean, median and mode of the above data.
Find the class marks of classes 10 – 25 and 35 – 55.
In the following data, find the values of p and q. Also, find the median class and modal class.
| Class | Frequency (f) | Cumulative frequency (cf) |
| 100 – 200 | 11 | 11 |
| 200 – 300 | 12 | p |
| 300 – 400 | 10 | 33 |
| 400 – 500 | q | 46 |
| 500 – 600 | 20 | 66 |
| 600 – 700 | 14 | 80 |
Define primary data and secondary data.
Explain the meaning of the following terms: Variate
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 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?
