Mean and variance for the chi-square (²) distribution.

Syntax

[M,V] = chi2stat(NU)

Description

• The mean is n
• The variance is 2n.

Example

nu = 1:10;
nu = nu'*nu;
[m,v] = chi2stat(nu)

m =

 1     2     3     4     5     6     7     8     9    10
 2     4     6     8    10    12    14    16    18    20
 3     6     9    12    15    18    21    24    27    30
 4     8    12    16    20    24    28    32    36    40
 5    10    15    20    25    30    35    40    45    50
 6    12    18    24    30    36    42    48    54    60
 7    14    21    28    35    42    49    56    63    70
 8    16    24    32    40    48    56    64    72    80
 9    18    27    36    45    54    63    72    81    90
10    20    30    40    50    60    70    80    90   100

v =

 2     4     6     8    10    12    14    16    18    20
 4     8    12    16    20    24    28    32    36    40
 6    12    18    24    30    36    42    48    54    60
 8    16    24    32    40    48    56    64    72    80
10    20    30    40    50    60    70    80    90   100
12    24    36    48    60    72    84    96   108   120
14    28    42    56    70    84    98   112   126   140
16    32    48    64    80    96   112   128   144   160
18    36    54    72    90   108   126   144   162   180
20    40    60    80   100   120   140   160   180   200