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Statistical significance testing

One-sample test to compare sample mean or median to population estimate

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Compare a sample mean (or median) to a population estimate (default 0) using the 1-sample t-test (or sign test for medians). P-values can be calculated for one- or two-tailed comparisons, and are compared to a specified significance level.

Inputs are:

  • population estimate of mean or median for comparison (default value is 0);
  • whether to use t-test (means) or sign test (medians);
  • specified significance level;
  • number of digits to display in results;
  • whether test is one-tailed or two-tailed; and
  • sample data.

Outputs include:

  • A summary of the data provided;
  • Confidence limits (based on specified significance level) for the sample mean or median;
  • P values for the difference between sample mean/median and the specified value;
  • interpretation of the results; and
  • plots of the data distribution and confidence limits for mean/median.