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OBJECTIVES OF PRESENTION

  • TO ENLARGE THE VIEW OF STUDENTS.
  • TO DEVELOP STATISTICAL SKILL IN THE STUDENT.
  • TO ENABLE THE STUDENTS TO ORGANISATION OF DATA IN VARIOUS FORMS.

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Organisation of Data

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Organisation of data is the second statistical tool under which data are arranged in such a form that comparison of masses of similar data may be facilitated a further analysis may be possible. The most popular way of organization of data is classification of data.

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Meaning of Classification of Data

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Classification is the of arranging data in various groups or classes according to their characteristics. There are two features of classification of data

1- Data are classified in various groups are classes.

2- The basis of classification of data is their characteristics (resemblances and affinities).

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Types of Classification of Data

There are following basis on which data are classified-

1- Geographical

2- Chronological

3- Qualitative

4-Quantitative

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Geographical /Spatial Classification

When data are classified according to basis of place is known as geographical classification of data

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Chronological Classification

When data are classified according to basis of time, is known as chronological classification of data.

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Qualitative Classification-

When data are classified on the basis of quality is known as qualitative classification of data.

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Quantitative Classification

When data are classified on the basis of quantity is known as quantitative classification of data.

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Types of Variable

Discrete variable

Concept of Variable

Continuous Variable

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Meaning of Discrete Variable

Which are measured in complete numbers like numbers of students, teachers, office staff etc.

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EMPLOYEE/STUDENTS

NO

STUDENTS

500

TEACHERS

32

OFFICE STAFF

6

D-GROUP EMPLOYEE

4

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Meaning of Continuous Variable

Which are not measured in complete numbers always like height in meter, weight in Kg etc.

Height in Cm

No of Students

110-120

10

120-130

12

130-140

11

140-150

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Types of Series

Individual Series

Types of Statistical Series-

Frequency Distribution Series

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Individual Series-

Individual Series is that series in which items are occurred single time.

Serial No

Value

1

10

2

15

3

18

4

20

5

22

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Types Frequency Distribution Series-

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Discrete Series

Frequency Distribution Series-

Continuous Series

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Discrete Series or Frequency Array-

Discrete series in which data are presented in a way that exact measurement of items are clearly shown.

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Value

Frequency

10

4

11

6

12

6

13

4

14

3

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Continuous Series-

It is that series in which item cannot be exactly measured; they are placed in a class.

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Class Interval

Frequency

0-10

10

10-20

15

20-30

20

30-40

18

40-50

15

50-60

9

60-70

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Types of Continuous Series-

1- Exclusive Series

2- Inclusive Series

3-Open End Series

4- Mid Value Frequency Series

5- Cumulative frequency series

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1 Exclusive Series

It such types of statistical series in which upper limit of a class are the lower limit of just next class

Obtained Marks

No of Students

00-10

8

10-20

9

20-30

10

30-40

9

40-50

8

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2 Inclusive Series

It is such types of statistical series in which all frequencies of class are included in the same class.

C.I.

Frequency

1-10

8

11-20

9

21-30

10

31-40

9

41-50

8

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Conversion of Inclusive into Exclusive Series

C.I

Frequency

1-10

8

11-20

9

21-30

10

31-40

9

41-50

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C.I.

Frequency

0.5-10.5

8

10.5-20.5

9

20.5-30.5

10

30.5-40.5

9

40.5-50.5

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Open End Series

The lowest value of highest value of the distribution are not defined.

Obtained Marks

No of Students

Below 10

8

10-20

9

20-30

10

30-40

9

Above 40

8

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Mid Value Frequency Series

The class interval are not given only mid values and their respective frequencies are given.

Mid Value

Frequency

5

8

15

9

25

10

35

9

45

8

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Types of Cumulative Frequency Series

Less Than

More Than

Cumulative Series

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Less Than Cumulative Frequency Series

Less Than

No of Items

50

44

40

36

30

27

20

17

10

8

C.I

Frequency

00-10

8

10-20

9

20-30

10

30-40

9

40-50

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More Than Cumulative Frequency Series

More Than

No of Items

0

44

10

36

20

27

30

17

40

8

50

0

C.I

Frequency

00-10

8

10-20

9

20-30

10

30-40

9

40-50

8

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Assignment Work

  • Explain the various ways of classification of data.
  • Haw many types of continuous series are found ? What is the process of converting inclusive series into exclusive series?

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THANK YOU