Alphabetical Statistical Symbols
Symbol
Text Equivalent
Meaning
Y- intercept of
least square
regression line
Slope of least
squares
regression line
Confidence
level
Cr
n-c-r
Combinations
(number of
combinations
of n objects
taken r at a
time)
n-c-r
Combinations
(number of
combinations
of n objects
taken r at a
time)
Covariance
Covariance
between X and Y between X & Y
CV
Coefficient of
variation
df
Degree(s) of
freedom
Regression:
y on x
, for line
Regression:
y on x
for line
Discrete
probability
distribution for
then,
the probability If X follows
Binomial
of number of
distribution with
successes in n
parameters n and
Where,
,
independent
p
r = 0,1,2, .,n,
random trials
under the
identical
conditions.
c
Link to
Glossary (if
appropriate)
Formula
Binomial
Distribution
Confidence
interval
, where
, where
Symbol
Text Equivalent
Maximal error
tolerance
E
E (f(x))
Meaning
Frequency
F-distribution
variable
or
Distribution
function
f(x)
or
H1
Probability
mass function
for large samples
number of times score.
where n1 and n2 are the
corresponding degrees of freedom.
Depends on the distribution.
The null hypothesis is the
Null hypothesis hypothesis about the population
parameter.
H-one
Alternate
hypothesis
M-S
An alternate hypothesis is
constructed in such a way that it is
the one to be accepted when the
null hypothesis must be rejected.
Testing of
hypothesis
Testing of
hypothesis
Interquartile
range
Measures
of central
tendency.
Mean square
Analysis of
variance
(ANOVA)
Sample size.
Population size
n-p-r
Fdistribution,
Hypothesis
testing for
equality of
2
variances.
H-naught
IQR
MS
Link to
Glossary (if
appropriate)
Expected value of
f(x)
H0
Formula
Permutation
(number of
ways to
arrange in
order n distinct
number of units in a sample.
Number of units in the
population.
where
Symbol
Text Equivalent
Meaning
Formula
Link to
Glossary (if
appropriate)
objects taking
them r at a
time)
n-p-r
Permutation
(number of
ways to
arrange in
order n distinct
objects taking
them r at a
time)
p-hat
Sample
proportion
Probability of A
given B
Conditional
probability
Probability of x
Probability of x
The attained
level of
significance.
p-value
Binomial
distribution
P value is the smallest level of
significance for which the observed
sample statistic tells us to reject the
null hypothesis.
Probability of
not happening
of the event
Q1
, where
Measures
Median of the lower half of the of central
data that is data below median.
tendency
Q-one
First quartile
Q2
Q-two
Second quartile
Central value of an ordered
Or Median
data.
Measures
of central
tendency
Q3
Q-three
Third quartile
Median of the upper half of
the data that is data above the
median.
Measures
of central
tendency
Sample
Correlation
coefficient
R
r2
r-square
Coefficient of
determination
R2
r-square
Multiple
correlation
coefficient
Symbol
Text Equivalent
Meaning
Sample
standard
deviation
Link to
Glossary (if
appropriate)
Formula
for ungrouped data.
Measures
of
dispersion
for grouped data.
2
S-square
for ungrouped data.
Sample
variance
for grouped data.
s-e- square
Error variance
Sample
Standard
deviation
SD
Measures
of
dispersion
for ungrouped data.
for grouped data.
Bowleys
coefficient of
skewness
Measures
of skew
ness
Pearsons
coefficient of
skewness
Measures
of skew
ness
Sum of
squares
t
Students t
variable
tc
The critical
value for a
confidence
level c.
Var(X)
t critical
Variance of X
for ungrouped data
for grouped data
tdistribution
Number such that the area
under the t distribution for a given
number of degrees of freedom
falling between
to c.
and
is equal
Variance of X
Independent
variable or
explanatory
variable in
regression
analysis
Eg. In the study of, yield obtained &
the irrigation level, independent
variable is,
Irrigation level.
Testing of
hypothesis
Symbol
Text Equivalent
x-bar
Arithmetic
mean or
Average of X
scores.
Dependent
variable or
response
variable in
regression
analysis
Meaning
Link to
Glossary (if
appropriate)
Formula
for ungrouped data.
for grouped data
Measures
of central
tendency
Eg. In the study of, yield obtained &
the irrigation level, dependent
variable is,
Yield obtained.
Z-score
Standard
normal variable
(Normal
, where X follows
variable with
.
mean = 0 & SD Normal
= 1)
z critical
The critical
value for a
confidence
level c.
Standard
normal
distribution
Number such that the area
under the standard normal curve
falling between
c.
and
Testing of
hypothesis
is equal to Confidence
interval
