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Statistical significance testing

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.


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