Chi
Square Calculator  Online
Below you can find a Chisquare calculator. In probability and
statistics, the chisquare distribution with v degrees of
freedom is the distribution of a sum of v^{2}
independent standard normal random variables. It’s one of the most
used probability distributions in inferential statistics.
This spreadsheet calculates the tailend value for points on a
chisquare (X^{2}) distribution curve. You must
enter the X^{2} value and the degrees of
freedom.
Chisquare distribution curve
The unshaded area
represents the tailend
value of X^{2}.
The shaded area
represents the percentile.
The X^{2}
distribution function is calculated using the following formulas:
with v
odd,
with v
even,
where
v = degrees
of freedom
Example: let's calculate percentiles and tailend
values
A X^{2}
statistic for
a given study was computed to be 3.2 with two degrees of freedom.
What are the tailend and percentile values?
You enter your data:
Enter degrees of freedom
= 2
Enter
chisquare (X2) = 3.2
and get these results:
Tail end value = 0.2019
Percentile =
0.7981
Please,
enable JavaScript codes on this page, othewise the calculator won't
work at all.


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