Advertisements
Advertisements
प्रश्न
Explain the meaning of the following terms: Class mark
Advertisements
उत्तर
Class Mark: The class mark of a class interval is half the sum of the class boundaries of that class.
APPEARS IN
संबंधित प्रश्न
Which of the two – the primary or the secondary data – is more reliable and why?
Explain the meaning of the term Frequency.
Explain the meaning of the term True class limits.
Explain the difference between a frequency distribution and a cumulative frequency distribution.
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.
Find the class marks of classes 10 -25 and 35 – 55.
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?
Can the experimental probability of an event be a negative number? If not, why?
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?
The time, in seconds, taken by 150 athletes to run a 100 m hurdle race are tabulated below:
| Time (sec.) | 13 – 14 | 14 – 15 | 15 – 16 | 16 – 17 | 17 – 18 | 18 – 19 |
| Number of Athletes | 2 | 4 | 5 | 71 | 48 | 20 |
The number of athletes who completed the race in less than 17 seconds is:
