Title: OA5 No jamovi
Course: PSYC 301 Statistical Methods in Psychol

This is the continuation of OA 5 for students who do not have jamovi. If you have jamovi, go here.

Download and open this file in any spreadsheet or writing program.

Go to this website:

https://www.socscistatistics.com/tests/studentttest/default.aspx

Follow these steps:

1. Click on T-Test Calculator
2. Copy the first four testosterone change data values (far right hand column) into the Treatment 1 Box, each line being a separate value. These are the scores:
  - 2.1
  - 0.0
  - 1.8
  - 1.2
3. Copy the second four testosterone change data values (far right hand column) into the Treatment 2 Box, each line being a separate value. These are the scores:
  - -0.9
  - -0.9
  - -2.3
  - 0.3
4. Scroll down and make sure Significance level is marked for .05 and Two-tailed hypothesis is marked.
5. Select Calculate T and P Values
6. Several new boxes will appear with much text.
  1. Scroll down to the Difference Scores Calculations box.
  2. For Treatment 1 it will have M1's value (the mean for the winners) and the variance for those scores.
  3. For Treatment 2 it will have M2's value (the mean for the losers) and the variance for those scores.
  4. t will be calculated below that, but also summarized in blue text below the box.
7. Write down
  - the t-value,
  - the associated p-value (Round as you see fit, but I assure you that you do not need 5 decimal places),
  - the two means and
  - two variances.
8. Take the square root of each of the two variances to get standard deviations.

The degrees of freedom for this is 6. N is 8 and N-2 is 6.

Click here to go back to the assignment to finish up.