View source for Ttest1

===Purpose===
One sample t-test.
===Synopsis===
:result = ttest1(x,''mu'',''test'')
===Description===
Calculates a one sample t-test for sample (x).
INPUTS:
* x = The name of a matrix (column vector) in which the sample data is stored.
* mu = scalar, the null hypthesis value for the mean {default = 0}.
* ttest = [-1,{0},1] indicates what ttest is for:
*   -1 - lower tail   H0: mean(x) <= mean(y)
*    0 - wo-tail     H0: mean(x) \~= mean(y) {default}
*    1 - upper tail   H0: mean(x) >= mean(y)
OUTPUTS:
The output (result) a structure with the following fields:
* t = test statistic.
* p = probability value
* mean = mean of x
* var = variance of x 
* n =  length of x 
* se = standard error
* df = degress of freedom 
* hyp =  hypothesis being tested
===Examples===
result = ttest1(x);
result = ttest1(x,mu); 
result = ttest1(x,mu,test);
===See Also===
[[ttest2e]], [[ttest2u]], [[ttest2p]]