SOURCEBOOK

jamovi | Data Analysis

Confidence Intervals

Obtaining One Sample Inferential Statistics

  1. First, enter the data (described elsewhere).

  2. On the “Analysis” tab, select the “T-Tests -> One Sample T-Test” option.

Choosing the Variable

  1. A set of options will then appear for you to choose the variables and statistics of interest.

  2. Select the variable you wish to analyze by clicking on it in the left-hand box and then the arrow to move it into the right-hand box.

  3. Output will automatically appear on the right side of the window. Output can be copied and pasted into other documents for printing.

Obtaining the Statistics

  1. To get the confidence interval for the mean, make sure the “Test Value” is set to zero.

  2. Check the “Confidence Interval” box (and alter the width of the interval if desired).

  3. Similarly, select other options that are important for you: “Descriptives” will offer a mean and standard deviation for the variable; and “Descriptives plots” will provide a graph of the confidence interval.

  4. Updated output will automatically appear on the right side of the window. Output can be copied and pasted into other software for printing.