Title: OA 5 jamovi
Course: PSYC 301 Statistical Methods in Psychol

This is the page for continuing with OA 5 using jamovi. If you do not have jamovi, click here to continue.

Click to download the jamovi file.

Open jamovi and load the file into it.

- This is what the variables mean
  - Participant is simply a participant identification number
  - Status is the winning or losing status of each participant, this variable divides them into groups
  - Testo_Change is the change in testosterone from before to after the game. Positive numbers mean an increase in testosterone, negative numbers mean a descrease in testosterone.

You will be doing an independent samples t-test.

To do this in jamovi follow these steps:

1. Select Analyses tab
2. Select T-Tests item (second from left)
3. In the drop down, select Independent Samples T-Test
4. The Dependent Variable is Testo_Change
5. The Grouping Variable is Status.
6. Confirm the following are correctly set:
  - Under Tests, only Student's  should be checked.
  - Under Hypotheses only Group 1 ≠ Group 2 should be marked
  - Under Additional Statistics only Descriptives should be checked.
  - Under Assumption Checks, nothing should be checked.
7. Your output will have the following:
  - A box showing the results of the marked items labeled Independent Samples T-Test
  - The results of the t-test showing the value of the t calculation under 'statistic', the degrees of freedom (df), and the probability of exceeding both positive and negative values of that t under p.
  - Group descriptives showing the mean and standard deviation for each status group level along with other statistics.
8. Make sure to either screen shot this page or write down all the information listed above.

After this, return to the assignment page.