DESCRIPTIVE STATISTICS AND INDEX NUMBERS
Contents

i.
ii.
iii.
iv.
v.
vi.

Application of statistics
Measures of centra tendency
i.
Arithmetic mean
ii.
Median
iii.
Mode
iv.
Geometric mean
v.
Harmonic mean
Measures of dispersion
Simple range
Quartile dev
Linear Algebra
Functions and graphs
A function is a mathematical relationship in which the value of a single
dependent variable are determined from the values of one or more
independent variables. The following is an example of a function in which y
is sa
CALCULUS
Calculus is a branch of mathematics which explains how one variable
changes in relationship to another variable. It enables us to find the rate of
change of one variable with respect to another variable.
Example
i.
The rate at which business reve
TOPIC 4
SOLUTION OF PFAFFIAN DIFFERENTIAL
EQUATIONS IN THREE VARIABLES
When the condition of integrability is satised, then we use one of the following methods to obtain the solution of the pfaan dierential equation. There
are various methods that can be
TOPIC 6
LINEAR, SEMILINEAR, QUASILINEAR
PDE OF FIRST ORDER:
Consider PDE of the form
P p + Qq = R
(1)
where P, Q and R are given functions of x, y and z (which do not involve
porq), p denotes
z
,
x
q denotes
z
y
and we wish to nd a relation between x, y