Statistics | Class 10 | Practice Set 6.5

Statistics | Class 10 | Practice Set 6.5

Statistics Class 10 Practice Set 6.5, frequency polygon for all the examples are drawn in the pdf file attached in this article.

Practice-set-6.5

For drawing the frequency polygon we need to make sure that all the classes given in the example are continuous. If they are not continuous then we should make them continuous.

Also read : Linear Equations in two variables | Class 10 | Practice Set 1.1

We need two things to draw the frequency polygon – one is class mark and other is the frequency of the class.

One thing we should always keep in mind that whatever data is given to us we need to add the two more classes in it while making the table.

One class will be the preceding class of the first class of the given data and the other class is the succeeding class of the last class of the given data.

Also read : Linear Equations in two variables | Class 10 | Practice Set 1.2

The frequency polygon of the following examples is drawn in the pdf file attached in the above section of this post.

1. Observe the following frequency polygon and write the answers of the questions
   below it.
2. (1) Which class has the maximum number of students?
3. (2) Write the classes having zero frequency.
4. (3) What is the class-mark of the class, having frequency of 50 students?
5. (4) Write the lower and upper class limits of the class whose class mark is 85.
6. (5) How many students are in the class 80-90?
7. Show the following data by a frequency polygon.
   Electricity bill in rupees : 0-200 200-400 400-600 600-800 800-1000
   Families : 240 300 450 350 160
8. The following table shows the classification of percentages of marks of students
   and the number of students. Draw a frequency polygon from the table.