AIOU SOLVED ASSIGNMENT 1 CODE 1430 STATE AND MATH B A
THE GRAPHICAL REPRESENTATION OF DATA
A)
THE HISTOGRAM: A “histogram” is diagram which is
directly related to a grouped frequency distribution table and consists of a
collection of rectangles whose height represents the class frequency (to some
suitable scale) and whose breadth represents the class width.
B)
THE GREQUENCY POLYGON: Using the fact that each
class interval may be represented, on average, by its class midpoint, we may
plot the class mid-points against the class frequencies to obtain a display of single
points. By joining up these points with straight line segments and including
two extra class mid-points, we obtain a “frequency polygon”.
TABULATION:-
It is the process of condensation of the data for
convenience, in statistical processing, presentation interpretation of the
information. A good table is one which has the following requirements:-
1-
It should present the data clearly, highlighting
important details.
2-
It should save space but attractively designed.
3-
The table number and title of the table should
be given.
4-
Row and column headings must explain the figures
therein.
5-
Averages or percentages should be close to the
data.
6-
Units of the measurement should be clearly
stated along the titles or headings.
CLASSIFICATION:-
“Classified and arranged facts speak of themselves, and
narrated they are as dead as mutton” this quote is given by J.R.Hicks.
The process of dividing the data into different groups (viz.
Classes) which are homogeneous within but heterogeneous between themselves, is
called a classification. It helps in understanding the salient features of the
data and also the comparison with similar data. For final analysis it is the
best friends of a statistician.
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