Statistical significance testing

Compare a sample mean with a specified value (default 0) using the 1-sample t-test, for summary values. P-values can be calculated for one- or two-tailed comparisons, or compare results to a specified significance level.

# 1-sample t-test for summary data

Compare a sample mean with a specified value (default 0) using the 1-sample t-test, for summary values. P-values can be calculated for one- or two-tailed comparisons, or compare results to a specified significance level.

Inputs are:

- - mean value and standard deviation for the sample;
- - a comparison value (default value is 0);
- - sample size for the sample;
- - specified significance level;
- - number of digits to display in results; and
- - whether test is one-tailed or two-tailed.

Outputs include:

- - Difference of sample mean from specified value;
- - standard error of the mean;
- - Confidence limits (based on specified significance level) for the sample mean;
- - t and P values for the difference between sample mean and the specified value and the appropriate number of degrees of freedom; and
- - a plot of the confidence limits.