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 - two-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