Problems on Histogram

We will discuss here some of the problems on histogram.

1. The histogram for a frequency distribution is given below.

Histogram Problem

Answer the following.

(i) What is the frequency of the class interval 15 – 20?

(ii) What is the class intervals having the greatest frequenciey?

(iii) What is the cumulative frequency of the class interval 25 – 30?

 (iv) Construct a short frequency table of the distribution.

(v) Construct a cumulative frequency table of the distribution.

Solution:

(i) 25

(ii) 20 – 25

(iii) 90

(iv)

Class Interval

10 - 15

15 - 20

20 - 25

25 - 30

30 - 35

35 - 40

Frequency

20

25

30

15

10

5

(v)

Class Interval

10 - 15

15 - 20

20 - 25

25 - 30

30 - 35

35 - 40

Frequency

20

25

30

15

10

5

Cumulative Frequency

20

45

75

90

100

105


2. The histogram for a frequency distribution is as shown below.

Problems on Histogram

Answer the following.

(i) Find the class intervals having the greatest and the least frequencies.

(ii) Find the class interval whose frequency is 40.

(iii) What is the frequency of the class interval 30 – 40?

(iv) What is the cumulative frequency of the class interval 30 – 40?

(v) Construct the frequency table of the distribution.


Solution:

(i) The class interval 10 – 20 has the greatest frequency as the rectangle corresponding to the interval has the greatest area, the height being the greatest.

(ii) 20 – 30

(iii) 30

(iv) 50 + 40 + 30 = 120

(v)

Class Interval

10- 20

20 - 30

30 - 40

40 - 50

Frequency

50

40

30

40





10th Grade Math

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