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The number of times an observation occurs in a data is called its
The frequency of a particular data value is the number of times the data value occurs. For example, if four students have a score of 80 in mathematics, and then the score of 80 is said to have a frequency of 4. The frequency of a data value is often represented by ' f '.
Upper limit is the highest number of the interval. Hence 80 is the upper limit.
Class mark is the midpoint of the upper and lower limits.
so for the given problem;
the class mark is
[ (95+100)÷2 ] = 97.5
Thus class mark is 97.5
Class Size: Difference between the true upper limit and true lower limit of a class interval is called the class size.
Class size remains the same for all class intervals.
For the class interval 10  20
Class size is 10, i.e., (20  10 = 10)
A pie chart is circular in shape which uses pie slices to show relative sizes of data
A pie chart is a circular chart divided into wedgelike sectors, illustrating proportion. Each wedge represents a proportionate part of the whole, and the total value of the pie is always 100 percent. Pie charts can make the size of portions easy to understand at a glance.
18 out of 36 people love reading, so reading in the pie chart will be represented by
When we find the central angle on pie chart we get 18/36 * 360 =180 degree, which is half of complete angle 360. so people loveing reading can be represented by semi circular
20 has the highest frequency as option b because as you have seen and frequency table the highest frequency is friendly only so it shows that it has the highest frequency and don't you feel bad I may tell you one thing this thing should not be asked you know these are very easy and you can see just a frequency table.
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