1.

ComprehensionDirections: Consider the following data and answer questions:S. No.Class limitFrequency1.101-20042.201-300123.301-400244.401-500405.501-600166.601-700127.701-800108.801-90059.901-100021. 242. 403. 164. 80

Answer» Correct Answer - Option 4 : 80

Cumulative frequency:

  • The accumulated frequency above or below a class boundary is known as cumulative frequency.
  • It is useful to know how many or what proportion of districts less than or more than certain specified population density levels exists.
  • the fractiles are plotted in Ogive

Example:

S. No.

Class limit

Frequency

Frequency (%)

Cumulative Frequency (CF)

1

101-200

4

3.2

4

2

201-300

12

9.6

16

3

301-400

24

19.2

40

4

401-500

40

32

80

5

501-600

16

12.8

96

6

601-700

12

9.6

108

7

701-800

10

8

118

8

801-900

5

4

123

9

901-1000

2

1.6

125

Total

 

125

100

 

Explanation:

  • In general, the cumulative frequency (less than) is considered as the cumulative frequency for the whole data set.
  • Therefore, the cumulative frequency of the entire data set is 125.
  • The cumulative frequency for the class limit 401-500 is 80.


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