Test a null hypothesis involving the means of two populations by performing a Student’s T-test.
Details
The t-test is any statistical hypothesis test in which the test statistic follows a Student’s t-distribution under the null hypothesis. Compute a t-test by selecting a numerical test variable and a categorical grouping variable.
The null hypothesis can be configured using the other parameters, for example you can choose between a one sided or two sided test and change the difference in means expected in the null hypothesis.
Output
The first section of the output is the printed output of a t.test run in R. There are more details on this printed output in the R documentation for t.test.
The output also includes a plot comparing the densities and means of the selected groups.
Parameters
| Variable name | Required | Constraints | Description |
|---|---|---|---|
| test_var | Yes | Column Input.
Integer, Decimal |
Numerical variable upon which the t.test will be run against. |
| group_var | Yes | Column Input.
Text, Integer, Boolean, DateTime, Date |
Categorical variable upon which grouping will occur. |
| mu | Yes | Decimal | Value of which to compare the sample mean. |
| alternative | Yes | Text selector. Default to two-sided. | Select from a greater, less or two-sided t-test. |
| paired | Yes | Boolean | Toggle between computing a paired t-test or not. |
| confidence_level | Yes | Decimal. Ranging from 0.5 to 0.99. Default to 0.95. | Set your t-test confidence interval. |