Statistical significance testing

1-sample t-test for summary data

Mean

Comparison value

Standard deviation

Sample size

Desired significance level

Digits after decimal point

Tails

1 tailed

2 tailed

Submit

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.