AHSEC| CLASS 12| EDUCATION| EDUCATIONAL STATISTICS
UNIT – 7
EDUCATIONAL STATISTICS
SYLLABUS:
(a) Concept of
Statistics, Use of Statistics in Education and Psychology.
(b)
Statistical Methods:
(i) Tabulation
of data-frequency distribution table
(ii) Graphic
representation of data meaning gains and rules – histogram and polygon
(iii) Diagrams
– Bar diagram and Pie diagram
(c) Measures
of Central Tendency:
(i) Meaning
and usage
(ii) Different
measures of central tendency (mean, median and mode) – their meaning, uses,
merits and demerits.
(iii) Computation
of mean, median and mode – from grouped and ungrouped data (mean both in case
of long and short method)
(d) Measures
of Variability:
(i) Meaning
and usage
(ii) Various
measures of variability
(iii)
Range-meaning, application, merits and demerits and calculation
(iv) Quartile
Deviation – Meaning, uses, merits and calculations.
CHAPTER SUMMARY
Statistics is the science
in which facts are collected in the form of figures keeping a certain purpose
in mind. These facts or figures are classified in such a way that a phenomenon
can be followed properly. It is the science of collection, classification,
presentation, analysis and interpretation of data.
Some methods of
statistics are frequency distribution, graphic representation, measures of
central tendency, and measures of variability.
A frequency
distribution is the organization of data and the grouping of scores into
classes. Some steps are necessary to classify or organize the data into a
frequency distribution. They are determining the range, size of groups,
matching, frequencies, midpoints. In statistics, the highest level of a class
interval and the lowest level of a class interval can be determined in 3 ways.
The cumulative frequency can be obtained by adding the frequency of the second
class to the frequency of the previous class. Graphical representation of
frequency distribution can be done mainly with the help of four types of
graphs. They are histogram, frequency polygon, cumulative frequency graph and
ogive.
There are
generally three measures of central tendency, the arithmetic mean, the median,
and the mode. Central tendency is the point that represents the entire
distribution.
The extent to
which the cases are bound to the central tendency or the extent to which they
spread themselves out is called their variability or dispersion. There are four
measures of variability. They are range, quartile deviation, mean deviation and
standard deviation.
Solved questions for 1 mark each:
(A) Write True/ False: Click here
(B) Fill in the blanks: Click here
Solved questions for 2 mark each: Click here
Solved questions for 3 mark each: Click here
Solved questions for 4 mark each: Click here
Solved questions for 5 mark each: Click here
***
NEXT CHAPTER: Click here
AHSEC PAGE LINK - CLICK HERE